I have spent days trying to mine, and cant get it started. I would buy in for $100, but not $300. And even then, I Am not sure if I could because I can't get the wallet to work.
I appreciate what the guys at Invictus are trying to do, but in my businesses, when the customers experience is not awesome, I try to make it up to them. Seems to me that lowering buyins is a way that they could both generate more money for themselves and have the community feel warm and fuzzy toward them.
Those warm and fuzzies turn into much needed loyalty as the inevitable hurdles of launching something awesome manifest.