Could I use this opportunity to ask a more general question: What are your incentives and goals when creating and maintaining open source projects? I appreciate

Could I use this opportunity to ask a more general question: What are your incentives and goals when creating and maintaining open source projects? I appreciate this sounds a little disillusioned, but after creating a number of reasonably succesful projects (http://golden-layout.com/ http://golden-layout.com/, https://deepstream.io/ https://deepstream.io/, earlier https://wolframhempel.github.io/photobooth-js/ https://wolframhempel.github.io/photobooth-js/) and I still can't find a fully satisfying answer.