If you hit a cap after several failed card attempts, that's usually a rate limiter on failed attempts rather than a separate problem — each retry counts against the limit, so retrying immediately makes the next attempt less likely to succeed, not more. The underlying cause is almost always the card being declined by the processor in the first place, not your account being restricted.
The most effective move is to stop retrying and wait a few hours for the limiter to reset, then try once, ideally with a different card if you have one. A support ticket (support@openrouter.ai) is worth filing if the same card keeps failing after the wait.
If you'd rather not wait, crypto payment doesn't touch this retry limiter at all. ROZO Checkout accepts BTC Lightning, USDC, USDT and more against an OpenRouter link for a 1% fee. ROZO is independent and not affiliated with OpenRouter or Coinbase.