Sources and provenance

#How this course was built

This course was researched from scratch for this platform, the same way Marketing was — no existing research brief or source corpus to compile from. Every module was built from live research conducted at build time (August 2026), cross-checked against primary or near-primary sources wherever one existed, and confidence-tagged using this platform's standard [Established] / [Directional] / [Speculative] system. Where a claim could only be traced to an unattributed secondary aggregator or an SEO/content-marketing site with no disclosed methodology, that is stated plainly in the lesson itself, and in several cases the untraceable claim is named specifically rather than either repeated or silently dropped — see especially Launch economics and the guru irony and Completion rates — the real data.

#Tier 1 — primary sources

• Katy Jordan, "Massive open online course completion rates revisited: Assessment, length and attrition," International Review of Research in Open and Distributed Learning 16(3), 2015 (DOI: 10.19173/irrodl.v16i3.2112). Peer-reviewed, 221-course sample, the single most load-bearing citation in this course — median MOOC completion 12.6%, range 0.7–52.1%. Cited in Why people pay for structure and Completion rates — the real data.
• FTC v. MOBE (My Online Business Education), Case 172-3072 — ftc.gov case record and press releases (2018, 2020, 2022). $125M alleged deceptive-earnings scheme, $17M+ settlement, $23M+ returned to consumers, permanent coaching ban. Cited in Launch economics and the guru irony.
• FTC v. Digital Altitude LLC, Case 172-3060 — ftc.gov case record and press releases (2018, 2019). "Six figures in ninety days" claim, $54M suspended judgment. Cited in the same lesson.
• FTC, "Business Opportunity Rule: Notice of Proposed Rulemaking" and "Earnings Claim Rule: Notice of Proposed Rulemaking," both filed January 13, 2025 (ftc.gov). Proposed, not finalized as of this research — the primary text for the "business coaching opportunities" expansion discussed in Refunds and the regulatory reality.
• Teachable, Kajabi, Podia, Skool, and Circle's own current pricing pages (teachable.com/pricing, kajabi.com/pricing, podia.com/pricing, skool.com/pricing, circle.so/pricing), fetched directly in August 2026. Primary vendor-disclosed fee schedules underlying The 2026 platform landscape.
• LearnDash and Gumroad's own published pricing/fee terms, cited in Self-hosted and lightweight alternatives.
• Kevin Kelly, "1,000 True Fans," kk.org/thetechnium (2008, updated). The primary origin of the audience-size-and-spend framework cited in Why people pay for structure and Audience-first vs. content-first — a strategic essay, not an empirical study, and treated as such throughout.
• Li Jin, "1,000 True Fans? Try 100," a16z.com (2020). The primary source for the recalibrated per-fan-spend argument in the same two lessons.

#Tier 2–3 — credible researcher-practitioner and disclosed-operator sources

• Nathan Barry (founder, Kit/ConvertKit) — publicly disclosed his own pre-founding course-revenue history, and Kit's own platform-scale creator-payment data gives it a genuine, if commercially-interested, window into real transaction volume. Referenced as background context for the audience-first mechanism, not directly quoted for a specific figure in this build.
• Pat Flynn (Smart Passive Income) — the longest-running publicly disclosed monthly income history in this specific niche, dating to 2008, including down months rather than only strong ones. Source-finder's own calibration note applies directly here: a source that also sells products is not automatically disqualified if its disclosure record includes real, dated, verifiable numbers over years rather than a single cherry-picked result — Flynn passes on those specific grounds where a launch-weekend screenshot does not. Referenced as an example of what genuine operator-tier disclosure looks like in this niche, not cited for a specific figure used elsewhere in this course.
• Independent creator-economy income surveys (multiple 2025–2026 reports, cross-referenced rather than relying on any single one) reporting the income-concentration pattern — roughly half of creators earning under $10–15K/year, a small top percentile earning the large majority of total income — cited in Audience-first vs. content-first.

#Tier 4–5 — self-interested platform data, used narrowly and labeled

• Kajabi's 2025 State of Creator Commerce report (Qualtrics-fielded, 1,717 respondents) and related aggregate platform-revenue disclosures — a vendor's own data about its own customers, used only for the narrow, directional point that even a source motivated to make course-selling look easy shows a concentrated, not evenly-distributed, outcome pattern. Cited in Audience-first vs. content-first.
• Skool's public Discovery-page pricing distribution (median $27/month, ~1,000 communities sampled, July 2026) — a platform-observed distribution of what creators charge, not an independently audited study, cited in How a course actually gets priced with that caveat stated directly in the text.
• Payment-processor chargeback-rate blogs reporting education/training at roughly 1.02% versus a ~0.60% all-industry average — corroborated across multiple independent processor blogs, but none disclosed an original data provider or methodology; treated as weak [Directional] and named as such in Refunds and the regulatory reality.

#Named and disqualified — sources this course specifically distrusts, and why

• Jeff Walker / Product Launch Formula's "$1 billion in sales for Jeff Walker and his students" claim. Fails the disqualification pass on two independent grounds: it sells the certainty that is simultaneously marketing the product making the claim, and it asserts operator-scale results across an unnamed, unaudited population rather than disclosed individual numbers. The cart-open/cart-close and seed-launch terminology Walker originated is cited on separate, historical-fact grounds in The launch sequence; the income claim is not.
• Gagan Biyani / Maven's "90–96% cohort completion" claim, publicized via a co-founder LinkedIn post. A company's own metric — specifically, week-two retention relabeled "completion" in secondary coverage — reported by a party with a direct commercial interest in the number, with no independent verification located. Named in both Launch economics and the guru irony and Completion rates — the real data.
• The "1–3% of your email list converts to a sale" launch-conversion benchmark, and the "paid courses achieve 60% completion" / "15–40% paid vs. 5–15% free" completion figures. Both patterns recur, in near-identical wording, across dozens of nominally independent course-platform and comparison-site blogs, with zero named study, sample, or methodology behind any instance this research checked in either case. Not repeated as fact anywhere in this course — see Launch economics and the guru irony and Completion rates — the real data for the full treatment.
• Course-refund-rate figures above roughly 5% circulating on refund-prevention and student-retention tooling marketing pages (variously "18–28%," "up to 30%," "chargebacks up 41% year over year"). Sourced, where sourced at all, from sites with a direct commercial interest in the completion/refund problem appearing as large as possible; not repeated as fact in Refunds and the regulatory reality.

#What this course does not cover, and why

This course does not re-derive general persuasion mechanics, positioning theory, or CAC/LTV modeling — Sales and Marketing already own that ground, and this course points to their specific lessons throughout rather than duplicating them. It also doesn't cover the mechanics of actually designing a lesson, a quiz, or an assessment — that is a course-authoring craft question, out of scope for a course about the business of selling one, and covered by this platform's own internal course-builder tooling rather than by reader-facing content. Course selling as a topic is, deliberately, treated here as narrowly as its own module map states: the mechanism, the platform economics, the pricing and launch mechanics, and the honest completion/refund/regulatory picture — not a general creator-economy or online-marketing course wearing this course's name.