I would go with

> You're not Google's product, you're their supplier; one of their many millions of suppliers.

Their product is your personal information, which you supply to them in exchange for their services. The fact that you are one of many millions of suppliers (each dealing in microtransactions) means you don't have a lot of weight when you need to get help from them.

A loss of a user represents a loss of income for Google in both cases. The reason they have little incentive is because they don't get much per user, but that has nothing to do with where the money comes from.