I would urge anyone on the fence about contributing to contribute! The more money raised upfront, the better able Jane will be to get publicity and thus further funding. So pledge, up your pledge, etc. If she doesn't reach the kickstarter goal, she gets *none* of the pledged money so far. It's looking like raising the money is not going to be a slam-dunk the way Double Fine's kickstarter was, so it's critical that momentum is maintained.
Of course, if you're not interested in the projects, then don't worry about it.