Substack: What Changed (2026)

What to verify on official docs

Paid subscription revenue share percentage live at checkout

Notes/discovery feature changes affecting growth

Custom domain and import tooling updates

Stripe Connect country additions

Screenshot or archive PDF at decision time — support disputes favor dated documentation.

Compare against in-stack alternatives if change materially hurts your use case.

Impact on quiz matches

SiteBartar updates tool attributes when rules change materially.

Rev-share vs SaaS break-even shifts — beehiiv-vs-substack compare when MRR grows

Your saved share link may reflect old scoring if attributes updated.

Retake Deep mode after major changelog.

Compare pages may lag days — trust official docs first.

Historical context

Vendors iterate pricing upward at scale breakpoints — beehiiv-pricing-2026 pattern for SaaS.

Promo codes don't change underlying rules — seasonal-prop-firm-promos for props.

Migration windows open when competitors undercut — newsletter-migration hub.

Grandfathered accounts sometimes exempt — read account-specific terms, not blog summaries.

Reader action items

Subscribe to vendor official announcements and rule-change emails.

Archive PDF of rules at purchase for prop firms.

Document payout or billing issues with dates for support tickets.

Report discrepancies via feedback — we investigate attribute drift.

Set quarterly calendar reminder to re-verify if vendor is business-critical.

Next step

editorial standards

substack-pricing-2026 for cost context

Editorial-standards for methodology

Compare in-stack alternatives if churning.