A lost group is not a lost plan
A plan points at a list of chats, not at one fixed group. Drop a dead chat, add a new one, and every subscriber follows.
unotabs takes the payment, keeps the subscription, and lets a bot open and close the door for you. Members join when they pay and leave the moment they stop.
Someone starts a chat with your bot, picks a plan, and gets a private checkout link made for them.
Checkout runs on Stripe. When the payment clears, the subscription is created and tied to that person.
The bot invites them to every chat the plan covers, and removes them again when the subscription ends.
A plan points at a list of chats, not at one fixed group. Drop a dead chat, add a new one, and every subscriber follows.
The bot only carries a token. Create another one, plug it in, and it picks up exactly where the old one stopped.
Renewals, cancellations and refunds reach the chats on their own, so nobody stays in after they stop paying.