The Borg/Attic/HN discounted price is a quarter of the regular price IIRC. Well worth it IMHO. They're reliable, answer emails very fast, and are happy to provide technical help should you need it to configure your system.
Our current, headline price is 4c per GB, per month and the borg accounts are 2c - so it is half-priced. (we're in the middle of a price drop this month - that page still had the old 3c rate on it ...)
The ZFS-created snapshots of your filesystem are disabled - it is assumed that you will handle your retention/point-in-times with the borg tool itself (we don't like doing snapshots of snapshots ...) Also, while you get full technical support for the use of rsync.net in general we offer no technical support for your use of borg.
The assumption is that borg users know what they are doing - and that assumption has proved to be correct.
I use their Borg discount as well, and am extremely happy with it. I do wish it were cheaper, but I get 150 GB for $50/yr, which is enough for me with careful rationing.
I wish I had a TB for $50 so I didn't have to be so judicious with my photos, but the ability to use Borg is so fantastic that I can't complain.
You can get get a 500GB storage server for about that price, a bit more for a TB. I run an Ubuntu instance and use borg to backup my home systems to this server.
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