Disclaimer: I wrote this article and made this website.
There was some talk of this issue in the recent fediverse inefficiencies thread. I’m hopeful that in the future we’ll have a decentralized solution for file hosting but for now I deeply believe that users should pay for their own file hosting.
Yeah, I wish it could be cheaper but I’m not a corporation. Instead I’m dependent on them to make a simpler product.
The target audience is certainly not developers because they can jump through the hoops to setup their own S3 + CDN or similar.