I have used gmail as my single mail account for more than 10 years and I don't deleted anything by real spam (unsolicited mail to harvested or stolen addresses). However, I get 99% of my mail forwarded from other addresses, I don't give my gmail address out.

When I look at the linked address I get

* no purchases * no subscriptions * (nearly?) all of my flights and hotel reservations since 2013.

Obviously Google is too American to understand that I travel more frequently by train than by plane. Several of the flights are displayed as "cancelled" although I am 100% sure that I took them without any rebooking or anything else. As a matter of fact the only flight that I could not take because of a strike is shown as "confirmed". That much about reliability of harvested data.

Originally it was part of Gmail that they scan your mails automatically in order to show you targeted ads. However, I remember they announced some time ago they would stop scanning mails. Probably I did not read the fine print in their legalize...

Evil company that I should do even more effort to avoid.