Thus there are many people who are both conservative by choice but gay by nature. No doubt they would love to meet other gay people who share their politics.
It’s possible this app would be perfect for them. The only downside I thought was that since they may not be openly gay, they wouldn’t want to take the chance of being outed but the apps messaging seems to revolve around the idea that conservative are an embattled minority so it may have the appearance (and maybe reality if features are built in) of protecting user privacy.
Sure, there are openly gay republicans and I don't want to ruin their chance to find love, but I'm very sure that people that are both openly gay and openly republican are quite rare. To make matters worse, to like the idea of a dating app specifically for your political orientation, you'll most likely need to be quite invested in it - someone moderate to slightly right will not be particularly pulled by this concept. And openly gay die-hard republicans are even rarer.
Lastly, there's also a deterrent effect. I'm not saying that republicans are necessarily homophobic, but I'm pretty sure that quite a bunch are at least not thrilled by the concept. If the app provides gay dating and therefore implicitly promotes it, it might drive away some of it's core demographic and, given that they're niche as-is, this might not be worth the tradeoff, especially when accounting for network effects.