3v3 Twisted Treeline Bots, XP exploit/bug.

Okay so the bug/exploit is that when you get a 3-win xp boost (290 RP), it won't be used when you win in a 3v3 bots match, if you win within 5-7 minutes. You get about 250 xp each game. If you win before 5 minutes you get no xp. And according to a friend if you win after 7 mins you lose the xp boost. So as long you win within 5-7, then you can abuse this indefinitely. I believe this is the reason why the top 2 players are lv.140+, otherwise they would have had to buy a lot of xp boosts.