As a former dating app cto, i believe the reasons we don't 
    have services that brag about their match or marriage rates 
    is not capitalist greed standing in the way of love. The 
    problem of matching people via an app is a genuinely difficult 
    problem for a number of fascinating reasons.

Well, at a basic level, how would we even know when they connect in real life?

(FWIW, I used to run sort of a dating site too, very small/niche, one person operation)

Indeed, but what you describe is a matchmaker service, not a dating app. I strongly believe and agree such a service can charge a premium, be successful, and brag about its stats. I just don’t think it works in the form of a dating app due to logistics and customer expectations.

I'll agree its more profitable if you never lose customers and gain them over time but selling a product that doesn't do it's job will eventually cause customers to leave and never come back.

Why won't the end game be people just stop using Match Group's products?

Alternatively, if you're not already in the dating industry then making a successful match making product is just profit (and then you can pivot to not working ...).