Seconding what ConnorW said, with one caveat about best dating page on facebook for singles.
If you only test one thing on the app, make it what happens after you flag someone.
I tested that one across two cities and the difference came down to how the match quality holds up past the first day.
If your area is thin, the site will not fix that, whatever whether it thins out after the first week looks like.
Worth comparing against Datedesire before you commit to anything.