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)