[mdoms]

> How would Google know which postings are fraudulent and which aren't?

There's a very very simple algorithm for this.

    Do I have a direct business relationship with this company?
     |
     |-> Yes -> take orders on their behalf
     |-> No  -> Do not take orders on their behalf

[dontreact]

I thought it was Grubhub/Doordash actually taking the orders, Google is just providing a link to their service.

[mdoms]

Google has a big blue button that says "make an order". Sounds like they're taking orders to me.