So vending HIV status is a straight up HIPAA violation, I'm fairly sure that's been found to be the case over and over again -- it doesn't matter what your business is, health information is covered by HIPAA. That's 250k per violation fine, and leaking status positive or negative is a violation. And every person, and every time they pass that information to every "partner" is a distinct violation.
HIPAA has nothing to do with Grindr unless it starts an acute care clinic.