What happens to the tokens I don't use?

Tokens don't expire, but plan tokens don't pile up. At each renewal, once the payment is confirmed, your balance is topped up to your plan's amount: if you had fewer left, you get the difference; if you had more — for example, extra tokens you bought — no new tokens are added that month. Settings shows your subscription tokens and your extra tokens separately.

Extra tokens you buy never expire and are spent first. If you cancel your plan, you keep your balance. The 60 free-trial tokens don't expire either.