Board Thread:R2D - General Discussion/@comment-26149284-20150304204955/@comment-25298348-20150304220340

You can't be a low rank and have a ton of money (unless you hack).

The XP system follows the amount of money you earn, so if you buy a ton of money, you'll earn a ton of XP and rank up quite a bit. (not exactly sure about that, a friend once bought a ton of money and got ranked to 9)

So, P2W or not, a rank limit would be useless.