rsync.net is more expensive than something like backblaze though, which makes me wonder why someone would use it other than for the geek factor.
The OP alluded to tarsnap being the best, but didn't really explain why that is. Rsync too sounds like it'd be fun to use, but it's 3x the price of backblaze b2 and has a minimum order size of ~$10/month
For me I use it because of their ZFS send support. It's just way easier with the system I have to use that as opposed to any other option. The cost difference is worth that for my situation (a decent but not huge amount of data and limited time to spend on managing it). (There are also some potential advantages in that it is just an online file store which you can pull from and validate at any time, as opposed to having a specific process for a restore). Also the cost on their website is a starting point, you may find they can go cheaper if it matters to you (and e.g. if you are willing to use a different payment schedule).
> why someone would use it other than for the geek factor.
FWIW I (eventually) moved to rsync.net from BB because of that time BB put some JS on their web interface that sent... was it filenames to Facebook? Something like that. I'm using Restic so it was completely painless.
The OP alluded to tarsnap being the best, but didn't really explain why that is. Rsync too sounds like it'd be fun to use, but it's 3x the price of backblaze b2 and has a minimum order size of ~$10/month