I've done my own digging on free dating sites no credit card required to read and come up short. I judge inbox read on one thing: the proportion of dormant accounts is the number worth watching, not the app store rating. Applied to inbox sites, half the frustration disappears once you screenshot the pricing page in case it changes.
Look closely at read sites and the deciding factor is the amount of recycled content, based on a fairly small sample. With inbox, most of the disappointment traces back to the quality of the filters.
The inbox sites angle is worse, because the practical move is to report problems early instead of blocking quietly. My honest read on free dating sites no credit card required to read: you get further if you treat an empty bio as a red flag. Tell me where the inbox reasoning above falls down.