That way, people in your campaigns will no longer correcting typos when they find them. Judging by the responses above, I'm not the only one doing this. Shitposters on the other hand would be totally fine with this rule, they don't care about improving their posts after making them.

I'd call it shitposting. It's not much more than posting "Reserved" and later editing it. I'd say it's cheating the campaign if his posts don't qualify for several days. By the time he edits his posts, the topic is a few pages longer already and nobody is going to read them.
It's also spam for the forum, but the Speculation and Gambling boards are filled with spam, so I don't think anyone reported it. Modlog doesn't show any deleted posts.

He had a lot of time on May 4