They totally lost me when the video announced a PRO version. Sorry, you can't claim to be open source while a few seconds later showing a paid-for version. Shame.
They need to choose between: 1) If you're gonna raise money, then release all your work for free. No "premium" icons. 2) If you're gonna have a freemium-premium model, then don't have a fundraiser and get others to underwrite your risks.