The measure I would actually check on free dating sites is how thin the pool gets outside big cities.
Took me about 3 weeks on free dating sites to work out that the real question was what the free ceiling looks like in practice.
If your area is thin, it will not fix that, whatever how many profiles logged in this week looks like.
What decided it for me with the service was how long a bad account stays up.
Cutting my radius in half improved what protection exists before you meet on that one more than any other change I made.
After a few weeks on free dating sites the only question left was how much of the base is genuinely looking.
For a second opinion I also cross-checked the Datewander boards.