Lymnus charges a flat monthly or annual subscription fee depending on your plan. Your payment is taken automatically on the same date each month (or year for annual plans).
Your token allocation resets at the start of each billing cycle. On paid plans (Starter and above), any unused tokens from the previous month roll over — but only up to one additional month's worth. Tokens do not accumulate indefinitely.
If you purchase additional top-up token packs, those do not expire and are consumed after your monthly allocation runs out.
You can view your current billing date, next payment amount, and usage breakdown at any time from Billing in the sidebar.