Working with a customer to implement RevTurbine (revturbine.com). We are implementing a reverse trial which is triggered by the key onboarding action (connecting the user's trading account), i.e. used as an incentive to complete it.

The trial is on a separate non-public tier (subset of lowest paid plan features) which provides great flexibility: play with limits to control AI costs, segment however you like (higher limits for stronger prospects), etc - which is all in line with the customer promise: 21 day trial (no tier specified). All can be done immediately (no impact on paid customers, messy migrations, etc) and AB tested. And you have usage/feature based upsells to the paid tier during the trial (on top of the time limit as a conversion moment).

This feels like it could be applicable to other folks, so thought would share. Happy to hear any comments/questions also.