Alfred E., quoting parts of my posts so to help you pose your own argument is welcome, but please, do read the entirety of my post yet again.
Or for a TLDR, Raze's sesponse come to that
You pledge to support. What they give you back is a sad after-effect of multiple factors which are best not explained here, but since they do happen to be prevalent, rewards you do receive. You do not pledge for rewards though. Kickstarter is NOT pre-ordering, is NOT shopping.
As for the example you happen to mention, be advised that PoE itself was delayed not once, but twice. The second time alone being for over a year. Not the Linux version, ALL of PoE You could perhaps reconsider. Either way, i wish you well!