Flash Sales turns a compatible membership, class pack, time-based pass or intro offer into a time-limited promotion. The same audience and product rules are checked in discovery and again at checkout. An introductory membership price can require complete billing cycles at the normal price afterwards, with exact dates shown before payment. Members can give notice during that minimum period when their scheduled end respects it; cancellation, renewal stops, allowance changes and pauses cannot remove the required paid period. Venue staff retain their separate administrative controls.