I hope that it will be useful and interesting to note that we have added 'rclone'[1] to our platform[2] which means that your rsync.net account is truly a swiss army knife for cloud storage organization.
This is very much like our 'borg' support - we actually have the binary executable installed on our end so you can run it properly. There is also a discounted signup for these two use-cases.[3][4]