20k over 10 weeks is fine and all, but then what? I've been writing open source software and maintaining projects for decades, and have in total received less than $500 from thoughtful donors.
Don't get me wrong; I'd LOVE to be able to do open source work full time, as my list of projects to benefit humanity extend far beyond what I could do in a lifetime where I must support myself with fulltime work. But the problem is how to maintain a steady income stream so that I can focus my attention on the projects...