A PTC offer runner that pays only on a real view
Open the target, run the timer, verify server-side, credit once. The four steps and the checks that belong to each.
2 entries
Open the target, run the timer, verify server-side, credit once. The four steps and the checks that belong to each.
The countdown belongs to the client, so the client will lie. Bind the timing to a signed server token and check it when the claim arrives.