It is the same for eBooks imo. There are some sources of DRM free eBooks, but they don’t tend to have the popular books. I’m always buying on kindle, because it is so laughably easy to circumvent their DRM as long as one has a kindle serial number attached to their account.
I’m hosting on DigitalOcean and buy the URL somewhere else (GoDaddy in my case). If DO becomes to expensive under load I’ll move to AWS. Have done this with a few other projects the same way: start out and tinker, finding a good setup on DO and move to AWS for price efficiency.