[agakshat]

Very often, it’s the phone networks which are selling our location data to these brokers. There is virtually no regulation on this, and for phone companies it’s basically free money.

[zucker42]

Does the ethnicity data also come from phone companies?

[agakshat]

I hope not, but I expect that with a few days of browsing history it’s trivial to predict ethnicity.

[rhizome]

Probably easier to get it via match.com and their subsidiaries.