I think its going to be hard for anyone to show how Google's actions hurt them.
Buyer's remorse. Example scenario:
Google used cookies to track me and display the most effective advertising that most greatly appealed to my preferences and was most persuasive to me.
Because the advertisement shown was more persuasive; they talked me into purchasing X with a more persuasive Ad, even though buying X was not worth it.
I would not have purchased it, if the more persuasive ad wasn't shown as a result of tracking me and tailoring ad selection to my vulnerabilities (preferences).
Therefore, Google should be responsible for my lost $$$ in non-refundable digital purchases.