That doesn't account for the good-will and word-of-mouth generated from any successful matches, which presumably could lead to many more customers than those lost due to marriage.
Edit: people ask me which app, not which spouse.
I don't know if anyone who's asked me has started using the app as a result, but I think it (anecdotally, again) supports an idea that a successful results for one app organically helps its name recognition.
Edit: unless you meant the difference was between people asking which app vs which spouse.
Almost every dating app is scammy, buggy, heavily paywalled, and barely used. If you see an ad for a dating app, it’s usually in that category.