The chance that you'd want to date a given randomly selected person, or even an algo-selected person, is small. The "Once" app sounds like navigating deep space in hope of one day reaching a habitable planet.
If you don't expect 30 matches a month to include a reasonable flow of date-worthy people, I think you've encountered exactly the problem the app is trying to solve. Your standards have been skewed unreasonably high by the constant availability of one more match, and some of the people you're not willing to date would make you perfectly happy if you did.