A hundred sandboxes at once from the first top-up, and time limits up to 24 hours
A paid account runs 100 sandboxes at once as soon as its first top-up clears, where a new one ran 50 for its first week; only a disputed payment, a suspension or an abuse report holds an account to 50. Paused and stopped sandboxes no longer count toward it, and an account keeps up to 1,000 in all. A time limit goes up to 24 hours, where it stopped at one, and a sandbox it stops reads stopReason time_limit where it read lease_expired, in the API, events, webhooks and OpenTelemetry export: code that compares with lease_expired should compare with both. A sandbox's disk is at most 400 GiB, and a larger diskMiB is refused at once, naming the limit. See how many at once.