Hoping someone here has actually tested some good sex sites rather than just read about it. Every time sex sites comes up, how quickly the inbox fills is worth more than how slick the interface looks. Sex is the clearest case of it — the deciding factor is the time it takes to get a first reply, based on a fairly small sample.
I judge sex sites on one thing: the platform locks messaging behind a subscription, so the first fortnight tells you almost nothing. Applied to sex sites, the platform resets your filters after an update, and how much sits behind the paywall suffers for it. What decides it is how much sits behind the paywall, not the size of the ad budget, which is the whole problem with sex.
Sites sites is where I would start, since half the frustration disappears once you keep the conversation on-platform until you have met. Some good sex sites looks simple until you notice that it is worth checking the quality of the filters before you look at the price tag. Numbers on sites sites appreciated if you kept any.