Yes, they do!! With torrents, it just takes a single seeder to keep the torrent alive, but Usenet isn't peer to peer - you're downloading stuff from a centralized server(s), and they simply cannot keep everything alive forever.
IMO it's fine though. Usenet provides you with very timely access to all the "newest" stuff, in excellent, very consistent quality.
And for older stuff, there's torrents.
Currently, no. But I also haven't opened a game on my PC in months, since that time sadly has to go towards my Master's thesis. But ever since I got the deck, I have heavily used it. It's easier to pick up and put down than the same game on PC, so I just do (did) more frequently.