I have mainly used ETH when using Dash wasn't an option or when I just mined some. As for Augur, like many projects, the "potential" of the project is taken into consideration way too much. Basically it's a lot like startup valuation.

On the other hand using Byteball was a breeze. If the team can market it properly and create great incentive based system like Dash/PIVX, they could take over some mess like IOTA while barely trying hard. The fees are tiny, chat bots are great and confirmations still happen in a matter of minutes (most of the time).