My tolerance for donation begging is directly proportional to how A) non-evil the thing is asking for the donations and B) how much utility I get out of said thing. KDE, personally, falls squarely into the "By all means, beg" category. I use their stuff every day for free, and their hard work deserves recompense.

I used to feel that way about prominent banners / cards. Then I tried to get donations on my own site and until I became hyper-aggressive I never received even a dollar. It was frankly disheartening. Now, it is not yet sustainable but at least moving in the right direction. In other words, they really have no choice.

This comment is like that 'no take, only throw' meme.

I want free software. Don't ask for donations, just give me free software.

How much do you donate?

I want to see KDE still improving and keeping up in another 30 years. To me it's no different from a telethon for PBS or a poster for Friends of the Library. Intrusive? From a certain point of view, but it pays the bills.