Where checkout changed
Stripe Billing subscriptions model lifecycle states, invoices, trials, renewals, and failed payments together.
AI SaaS pages and support flows should explain trial, upgrade, downgrade, cancellation, failed renewal, refund, and access restoration states.
Do not trust one conversion number
The useful question is no longer whether a purchase happened; it is which step created the hesitation, missing fact, or measurement gap.
Check the event model
- Define seven states: trialing, active, payment failed, grace period, canceled, refunded, and manual review
- Keep the test narrow: one low-risk task or tool entry before connecting permissions, logs, failure handling, and human takeover to production
What still needs proof
Unclear subscription status turns payment friction into trust friction. Keep the original source open so the announcement, the evidence, and this site's interpretation stay separate.