I was looking at object storage recently and I hadn't realized how much profit cloud providers drive via egress. And it's so perfectly hidden from the marketing. Ended up going with Cloudflare R2 for free egress.
I go full course with supabase, they have compatible S3 storages. So auth, db, storage in same place and pretty easy to manage.
Just imagine if Huggingface used Vercel and paid their prices. It would cost them quite a few dollars for every decent-size model download. (Or AWS egress prices, or any comparable service.)