Wall Street has a hard time understanding Grindr, a gay dating and hookup app whose yellow mask icon and distinct notification sound is like a Bat-Signal in the gay community. Grindr is perhaps best known on the Street for performing better than its publicly traded peers. Match Group — which owns Tinder and Hinge — and Bumble are both down flat in the past year, while Grindr is up nearly 30% during the same period. “Most investors don’t use our product at all,” said George Arison, CEO of Grindr....