I was, and still am very excited about the prospects of this game (well the vision anyways, no clue if they will succeed in implementing it).
I'd really love to support them so they can realize their vision, but the prices to access beta and alpha testing are just too outrageous (not to mention too many tiers IMO). I'm not going to pay what they're asking to get into a beta that likely won't happen for over 6 months. I also think it's a bad idea to "consider you bought our game already". That should be a higher tier than beta access, maybe not alpha access. Just because you get into beta or alpha, doesn't mean you should get the game too (IMO). I'd be happy to buy my way (and support devs at the same time) into beta or alpha access, and still buy the final product on release. That happens with a lot of other games, they allow people into the beta for free, and when the game releases, you still have to buy it.