Easy guys. It does not matter at what stage you backed the game. We are all in this together
The fact is pre-alpha and alpha are both testing phases, despite what AAA and other companies have turned their betas into. These phases are for finding bugs and making the game better, not "playing". We all benefit by having people test it, find bugs that need to be fixed before release, and give general feedback to the Devs so that they can release a great game.
Be happy people are continuing to donate to the game. That money goes directly into making the game better.