I believe they try to indirectly say they are using SerpApi or a similar product that scrapes Google search results to use them. And other big ones use it too so it must be ok...

That must be the reason why they limit the searches you can do in the starter plan. Every SerpApi call costs money.

Google is also suing SerpAPI

And I can't prove correlation but they refused to index one of my domains and I think it _might_ be because we had some content on there about how to use SerpAPI