All yums.

Ok so, the instance owner pays them to host, and with that revenue… They pay the instance owner back? Isn’t that just a “discount” with more steps?

What are they getting income from? Are they wanting to run ads on your instance or something?

It’s a newer image file format. You could think of it as a “better” version of a GIF or PNG. It compresses to a smaller file size with better quality, so lots of sites are using it now to speed up image loading without sacrificing quality.