Close to my view, except on whether it thins out after the first week.
If you only test one thing on the service, make it whether the good profiles are already taken.
Out of roughly 60 matches on the platform, 6 turned into an actual conversation.
If you bounced off this before, revisit that one and check whether the active count matches the claimed count first this time.
Anything I recommend around dating sites for over 50 in the United has to clear one bar, which is how many profiles logged in this week.
That is my read on dating sites for over 50 in the United anyway, others will have had different luck.
If this one does not work out, Rendate, which came up earlier covers similar ground.