micro payment use cases

Hi All

Is there a pointer to use cases collected for micro payments?

Preferably the use case is to do something simple for a fraction of a
cent.  Ideally the user will need no prior setup except for having a
browser.

The 3 I have so far are :

Paint a pixel : e.g. https://satoshis.place/
Pin a file for IPFS
Win a small reward from a slot : e.g. https://codepen.io/gaoryrt/pen/oyyMBx

Im planning to integrate lightning network with Solid and the web, so any
use cases collected with help with demos

Thanks
Melvin