ultra.cc user here as well. Cheapest option (no streaming) and am super happy. Yes, it's not a dedicated connection but it is sufficiently fast. Shell access to the box, easy app installers, webdav, sftp, and web access. Egress over ssh (rsync/rclone) does not count towards bandwidth (unlike http(s))
Been using them for 6 months now.
Pretty much this. Once you put it on the internet it's out of your control. It might disappear, it might not. Best just to assume it won't. Unless it's useful information, then it probably will.
Russian dull men's club