Here's How Activity is Shared with Facebook

Joe opens a Grindr account and says he's HIV negative but takes PrEP to avoid getting HIV.

The creepy Grindr app shares Joe's activity with Facebook using "business tools".

Facebook receives Joe's HIV status and that he's taking PrEP saves it with his Facebook account.

The activity is saved as "opened Grindr and said Negative, on PrEP".

Facebook sells Joe's HIV status to scummy lawyers, and Joe starts getting ads about Truvada lawsuits on his Facebook timeline.