That said, I've tried PUT-ing directly the Azure but quickly discovered that Azure actually has an ingress(!) quota on bytes, not requests like S3 or S3-likes I've seen before.
I have not implemented a S3 target yet. I might try. I'm particularly interested in targeting Cloudflare R2 as a temporary staging area so I can download the takeout files via a resumable or bulk download manager for a local backup without heavy bandwidth costs. AWS S3 also has their own competitive Archive tier too.
Maybe keep an eye on https://github.com/nelsonjchen/gargantuan-takeout-rocket/iss...
Yes, so is Wasabi. It doesn't charge you for ingress/egress data, so there is a clear cost advantage over similar services.
Disclaimer: I'm a Wasabi official partner in Brazil.
As for that special-ness you've mentioned, Wasabi is actually falling behind on that "charge you for ingress/egress" point since has a serious asterisk. One of the reasons I'm far more interested in Cloudflare R2 for a possible future temporary staging platform for local downloads is because it's genuine not "charge you for ingress/egress" as Wasabi says "don't egress more than you have stored" or we'll ban you. R2 does not have that limitation there. In fact, I've used it to serve a 28GB file that have been downloaded many, many times with only 28GB stored in R2. Such a thing is against Wasabi's use and the threat makes it unsuitable for GTR.
As for cost, like a final destination, there is no option to do Deep Glacier or Archive tier like on AWS or Azure. It is significantly more expensive.
So, I guess the TL;DR (heh, quite literally in this case) is that if Wasabi allows you to download something like an Ubuntu ISO to Wasabi storage by giving it the ISO URL from your phone, it'll likely work for you. Otherwise, you're back in the VPS setup TFA was seeking to avoid
Wasabi allows cloud-to-cloud migrations[1].
Disclaimer: I'm an official partner in Brazil.
Hypothetically one could trick the Cloudflare workers into exposing those Takeout URLs under fake GetObject request-response handshake, but ... what a lot of work just for Wasabi
From the outside it's a lot closer to the storage transfer job stuff I've seen on GCP and yet also kind of far as it's gated behind those infernal "talk to our team" for access gates.