Checkers charge for every account up front. Mutation tools charge for every account except ones that were invalid before running (those are refunded). OAuth boost charges only successful boosts, and the Token Formatter is free.

Yes. Most tools accept bring-your-own proxies for parallel speed, with automatic rotation and pacing.

Categorised result files are kept under Activity so you can re-download any past run.

No. You pay per run from your wallet, or buy a license for unlimited use of a tool for its period.

Confirmation is automatic but can take a moment. Keep the invoice open - it updates itself. If it is still stuck after a few minutes, contact support with the invoice ID.

It is used only for that run and is not stored beyond what the run needs. For the Nitro Redeemer it is wiped once Nitro is delivered and never appears in the order log.

No. Your payment is kept and you can retry with the same token or a different account, or start a new order.