Maybe I'm just spoiled from spending $15-$20 on Kickstarter games and getting beta access, but as long as Light Table looks like an awesome toy instead of something I can build commercial software with it's hard to justify dropping $100 on it. That said I'll probably throw in $50.
I don't see it as chipping in $100 for Lighttable itself (which I do want), I see it as showing there is a very real demand for new thinking in IDE-land.
It's only $100 so there's no need to forsake anything. I bought a personal license for IntelliJ IDEA, for example, and I upgrade to every new version. I believe in buying software that makes me more productive.
I find it kind of strange that people in the software business have such a hard time paying for software. I hope this doesn't rub off on the general population.
In this case, personally, I am.