Hosting on GitHub personally worries me because it isn't their core business.
Hosting on S3 is cheap and I know there are tools to help me, but it's complicated to set up.
Netlify hits the sweet spot by being integrated with git, so you still have to be somewhat technical, but taking care of of a bunch of devopsy stuff. Things that their customers either don't know to do or don't want to. For example I thought about setting up let's encrypt for my personal site, but netlify has that figured out.
Hosting on S3 is cheap and I know there are tools to help me, but it's complicated to set up.
Netlify hits the sweet spot by being integrated with git, so you still have to be somewhat technical, but taking care of of a bunch of devopsy stuff. Things that their customers either don't know to do or don't want to. For example I thought about setting up let's encrypt for my personal site, but netlify has that figured out.