Adding a counterpoint about whether the search actually respects what you set.
If you only test one thing on that one, make it where the paywall really kicks in.
I logged into it at different times of day to get a read on what you lose by never upgrading.
Assuming you're not paying, where the paywall really kicks in is where the app gets tight.
Datewander - worth a look came up when I asked the same question last year.