As for amazon cloud storage I am using a US data center already. In the case of Wasabi I have changed all the bucket calls and able to write to the bucket but not read. There are other references to cloudfront in the script I am not sure how to handle. Maybe creating a community fund to have a script written for Wasabi might be a solution if enough interest is shown.
To have successful social media site, without filling it up with 3rd party advertising, is by memberships or a wealth philanthropist. Two major pillars a platform must have to accomplish this are; reliable up-to-date and affordable payment processors and offsite cloud storage options to sustain growth.

We're going to add more storages anyway including Wasabi - https://github.com/unaio/una/issues/1896 - but we can't tell when exactly.