Yes, some paid ones that encrypt the data and have been in business for many years. They're not publicly listed in the stock market, and so they don't have to put up with the self-destructing demands of shareholders
Interesting, you're certainly more brave than me :) One of the places I used for backups been around for 2 decades, I still wouldn't trust them enough to store my only copy of something.
I use mirroring and version control for the most important files, just not for files that I can possibly do without, but yes, it would be good to have.