I think they did. The users of Tinder don't need Tinder to tell them the friend they already have, they need it to tell them where potential matches are. So lowering the standard of degree that Linkedin uses would (I assume Tinder would argue) lower the barrier to foster communication between potential matches.
You're not going to use Tinder to date your friend. But you would use it to date your friend's friend. Smart move by them.