Generating ad revenue in general is a great idea, as long as it's not intrusive. So no sounds and no popups. A simple banner ad is fine and that's exactly what POB(we should figure out a better name for him) is planning according to himself on discord.
I think it should go into projects that raise the value of every single POB-token in circulation. There is already enough motivation for people to be the biggest poster, the biggest commenter etc.
The least creative way would be to pay a dividend of swap.btc to anyone who has POB staked. That's not particularly clever, but at least it would connect POB to another coin.
Another idea would be to create a fan shop of POB articles like the mug @vempromundo came up with.
The articles are bought with BTC and sold to us in POB. These POB tokens can be sold on the market and donated to charity.