Hi @honestlykeep! Welcome to the PBC!
It's exciting that you're getting started with your research around this. 🙂
I recently wrote this reference post, all about how people make money using Pinterest:
Also, the details, eligibility requirements, etc about the Creator Rewards program are at this link: (Keep in mind, the program is still in beta right now!) https://help.pinterest.com/en/business/article/creator-rewards
I hope these are helpful for you!
As far as ads, I think perhaps you are asking about the income creators earn when brands pay them to create "UGC" (user generated content) that they can pay to promote. Is my assumption right? I'm not a tax professional, but I can tell you that I personally would consider that taxable income.
If my assumption is not right, let us know what you mean!