There’s a bunch of tier 100 Greater Rift players on the leaderboards. It’s basically an exploit that is done by playing in a lower level game (basically have a level 1 create a game – Greater Rift difficulty will thus be scaled off of that making it easy to clear that rift and progress through to a tier 100 Greater Rift.
Stating the obvious, but this along with other exploits will be fixed.
