You realize that's not about server costs but paying people that already do open source work (Like the window manager) to get paid for their work, which is what everyone in the OS community always wants?
What makes you come to the conclusion that "more important" dependencies wouldn't receive funding in the future?
But both have done great work too - I use gnome-keying and KDE Connect all the time.
Calling work on these newer projects not "real" work is frankly just disrespectful, even if you don't personally use them. And they are not paying for dotfiles, they are paying the core devs of the software...