Do you have a source for claims that (a) google parses emails for purchase histories and (b) sells it?

https://myaccount.google.com/purchases is empty for me, and I sure do have a lot of email receipts on my gmail. It also says "Purchases made using Search, Maps, and the Assistant are organized to help you get things done, like tracking a package or reordering food".

https://www.cnbc.com/2019/05/17/google-gmail-tracks-purchase... "Google says it doesn’t use this information to sell you ads."

Google used emails for ad targeting which was mentioned in Microsoft "Scroogled" ad campaign in the US. But Google says it stopped doing so years ago.

Do I miss something?

No, no, Google doesn't read your emails (any more); they just give access to them to certain "developers" (read: arbitrary paying third-parties).

I was referring to https://mail.edison.tech/, but they compete with unroll.me (rakuten intelligence) in selling people's emails.