Business case for IPFS

Hi, Please consider me a extreme amateur when asking this. I am trying to visualize.
Who would pay for using IPFS and hosting their content on it.

IPFS is a protocol. Just as nobody is paying to use TCP/IP, nobody is paying to use IPFS.
What you can do, though, is paying some actors to store data for you, like you do with any Cloud storage services. For that you can pay “pinning services” that are operated by companies like Pinata, for exemple, or use the blockchain solution to match people having storage capacity and those looking for some: Filecoin.

Just like you can build a wide variety of use cases and websites on TCI/IP, have a look to what some companies built on IPFS here: Concepts | IPFS Docs (click on case studies on the left).