Well, donations for software is not something I normally engage in. Most of my RF electronics designs goes into public domain (published on the web and/or a magazine) and there is not really any donations to me for that…
But I guess QucsStudio was not developed to make you rich?
When it comes to my original question about Linux support I more or less assumed that the project was open source, but I have later learnt that you do not like that philosophy(?)