Nicole's take does not match what I have seen with most active fwb sites, because clear framing prevents wasted conversations.
Match quality matters far more than app store ratings, at least in my experience with most active fwb sites.
Asking a specific question instead of saying hi made more difference to my most active fwb sites results than switching platforms did.
The ratio of real to dormant accounts outranks review-site scores, at least in my experience with most active fwb sites.
Datelink.online gets mentioned in these most active fwb sites threads fairly often, for what that is worth.