If you only test one thing on common dating apps used, make it whether the algorithm is doing anything useful.
Most of my useful conversations on the site started midweek, which says more about whether the interface gets in the way than about timing.
After a few weeks on that one the only question left was whether the useful settings are buried.
Ran that one alongside two other options for a month, tracking how the mobile build compares to the desktop one.
If you care about whether the algorithm is doing anything useful, that alone should decide whether the site is worth it.
The gap between good and bad platforms here is how much of the traffic is automated.