I imagine that making a profitable dating app is difficult. Your most successful customer is one that no longer needs your product. If you make it a subscription service, there's a perverse incentive to make sure you never find a good match. But if you make it a one-time fee, the fee has to be high enough to make a profit, but not so high that people don't want to gamble the money. Tinder's biggest problem, IMO, has…
Only if you let it be. You have a market of people who want something they know is naturally difficult. So they'll struggle to recognize if you start making it more difficult to obtain (because they already expect dating to be hard).
So you can make things more difficult for users (reducing the number of "successful customers") then ask for more money to make it less difficult.
The only risk is that if a competitor makes it too easy, people will leave your platform... but that's why Match Group exists. They buy any large enough competing platform and ensure that the average difficulty across all their owned platforms is fairly consistent.