I'm a supporter. I don't have to justify myself to you.
Asking for $100 to playtest the game is extortionate, and that some people chose to pay that much is none of my business, but Snats chose to make $100 a tier, and lock the game to that tier. $100 is more than AAA games charge for special editions of their releases. And Snats is charging that for early testing of an incomplete product.
It's greedy from Snats, no matter how you look at it, regardless of the thoughts and feelings of the Angel tier users. It is possible for supporters to want to give money, and Snats being greedy at the same time.