Yeah if you are going to pledge for something you like, do it early, that way you can help in creating the psychological beggar tip effect (ie, because you already see others tipped, you feel more compelled to tip yourself because well, if others tipped, then it must be worth tipping.)
And the earlier this gets going, the more chances the project has to succeed, if that is a project that you would love to support. As said above, you get refunded if the project fails.
I do not support projects anymore, however. It's a philosophy I've adopted for a long time now - I am rewarded in my life for the job I do and deliver, and so I treat others equally, I don't operate on a loan of faith and good intentions. But that's fine, there are plenty of others who do, so as long as it works for them, it works for everyone.
I said it before, but I hope to see this game finished and play it one day, paying its full price when it is fully released.
