Grindr does operate in Europe, though. And its core functionality relies on hella location data (my friend in college used to check whether his roommate was home by opening Grindr and seeing if his roommate was the closest match... 5m away? guess he's home!) so I think requiring them to use that data appropriately is prudent.
(Disclosure: I work for mnemonic, the company that performed the report, although I joined later)