[fleddr]

That's not the reason you keep seeing ads for products you just bought. Google was aware of your interest in the product yet was unable to track that you actually bought one. So they think you're still looking.

[throwaway3699]

It's also not Google who controls re-targeting lists. At least on Facebook, retailers can easily tell this ad not to be shown to you after you paid.

[dylan604]

hence the /s at the end of the comment

[fleddr]

Sorry, missed that :)