My concern in this isn't even because there's a scam accusation against the user OP reported, I'm wondering why a user would lock a thread they opened and only open it momentarily to bump it. What's that for? It means they're hiding something they don't want anyone else commenting on. It's not even like a self moderated thread where everyone can post in but being censored by OP. Here we've a case where OP wants to be seen and read but doesn't want to read from anyone else. It's bad and I think to that effect mods should step in and either delete the thread or lock it permanently themselves.