I can see that this would make sense. Being a developer myself (well now more operations, but still) and having worked with large code bases, I can imagine that this isn’t something you could maintain with only volunteers. 0.1% donation rate also doesn’t really shock me.
It’s a great tool for the occasional DIY PCB that I do. I’m not an electrical engineer but I made a large 35x35cm PCB with Eagle once and that gave me a fair share of gray hair.