Obviously it's because of the Binance listing.

If you hold some Augur, I suggest selling some off right now. There is no point in buying because it's complete and utter hype right now that is driving the prices up for REP, nothing else. Sooner or later the hype will die down, and prices will follow.

Getting listed by an exchange doesn't mean that your project is all of a sudden better. It does create short term hype like this, though.