Re: That makes no sense except this part which is worth acting on, now that we have GDPR:
This isn't entirely true; the data download now includes a list entitled
“Advertisers who’ve uploaded a contact list with your information. Advertisers who run ads using a contact list they’ve uploaded which includes contact info that you’ve shared with them or with one of their data partners”
The scary thing is, when I looked at this list prior to deleting my account, it included my bank.