@Korrigan It promotes people lying about having won a previous Store Championship.
Alternatively, it promotes manipulating game results.
After winning a Store Championship, you could go to the others and play well against the other good players, and throw against worse opponents, in order to attempt to deny a good player a BYE.
It's pretty "out-there" as commitment to increasing your odds of winning at regionals but totally doable, #play2win.
Seems like this ruling will only really be applicable in communities that actual want it, since you basically have to call someone out after they've won their second BYE, and then you just seem like a sore loser
Overall, I think the ruling is pretty dumb. The best player on that day should be awarded the BYE, just as it always has. I don't really understand why FFG felt the need to discourage competitive players from attending tournaments.