I haven’t checked the pricing in a long time but you can use Tarsnap also if you have to backup only 7.3kb (okay I might ne exaggerating here but you get the drift) and pay for only that much. You can’t do that with Wasabi et al.
Also it’s really simple and does what it says it does, nothing more, nothing less. In today’s everything convoluted and bloated world this is a luxury imho. The GUI app is also quite good and functional. Support is prompt (that is if you need it).
You don’t have to worry about file being deleted just because your machine didn’t connect or backup for some time even if you keep paying (hello Backblaze) etc. I mean there’s no circus, melodrama , and cliffhangers involved.
I personally would never use it backup my entire laptop, due to price alone. But I have a subset of VVI files and Tarsnap is one of more than one backups for those files. So for that use-case Tarsnap is perfect for me, so far.