(FWIW, I used to run a very small/niche, mildly profitable social/dating thing.)

    As soon as you find love on a dating app, they 
    "lose" you as a user, you stop paying your monthly fee

I think this is clearly true for a lot of business models, but I really don't think this is as true for a dating app.

As a business, you are competing against an endless array of other options. How many dating apps are there? A billion? If people don't like the matches you're serving up, they'll try one of the other options... not just hang around your app endlessly, hoping it improves.