Hi- Eric cofounder of StackBlitz/Bolt here, not sure what OP is talking about? You can cancel your subscription at any time over at https://stackblitz.com/settings/billing
Here's a screenshot I just took of my own billing page (see the "cancel subscription" link under the "Current Plan" section): https://imgur.com/a/6ZTWgEL
Bolt = StackBlitz, ie Bolt doesn't have it's own subscription plans - if you go to your stackblitz billing profile I linked above you can cancel and downgrade to the free plan!