Well, there's always the possibility of silly comments on the internet, but Starsector would hold up pretty well on Greenlight even now. It's also good to get in early so you can build up your votes (at least, this was the case; it might be more open now).
As for Kickstarter, yeah, it's quite a bit of work to have a successful one, the site and Amazon collectively take 10%, and physical rewards take a nice bite out of the total. Prison Architect is closing in on $8 million now, so alpha funding can definitely keep up with Kickstarting - though I suppose it requires a lot of work itself.