My take: patience is genuinely the differentiator, dull as that sounds — happy to be argued with on that one. What makes modern adult chat sites better than the old IRC channels? Open to being told I am wrong — the messier the better.
From my side, if basic messaging sits behind a paywall I move on fast — nobody tells you this at the start.
Having tried a few, the slow approach tends to produce better outcomes than the volume one — it is not complicated, it is just easy to skip.