So the reason it makes me uneasy is that at the same time as I do want KDE to succeed, I do not want this tactic of begging for money in annoying little on-screen pop-ups to succeed. If it does, then perhaps it might spread to other free software projects. If all of the hundreds of them that go into a linux distribution start feeling free to make their demands it will be a real mess. As some old philosopher said: To judge the morality of an action, consider what would happen if everyone did it.
I remain an Xfce user. They also accept donations.