This type of activity could lead to managers not allowing edited posts to count which IMO I think would be great. Is he cheating? Technically no, but other managers may not feel the same way. Depends on the rules for the most part.
You have one bold rule in your campaign and I have the same rule at the very first of my campaigns. We don't tolerate post bursting. It usually brings no good output. Besides, I consider post bursting as less effective in terms of impression count. That's something else.
Well, Saint loup is post bursting here but beating the manager. This is something a manager can barely notice, the chance of noticing this is very close to zero. Isn't it cheating? Post bursting isn't allowed but they are doing exactly that. I checked last 7/8 post and they were edited within a little more than half an hour. Would you count that valid post? I didn't check more, it's possible that he has edited many more posts in the same day and in the same hour.
I'll put a neutral tag so I don't have to even accept him in any of my campaigns.