Genuine question about dating website for professionals from someone who's tried the obvious routes. Check sites is where I'd start, since the deciding factor is how well it works on a weak connection, based on a fairly small sample. The picture changes for time-poor members once check sites enters it: how far the free tier gets you collapses as soon as the platform hides read receipts on the free tier.
I judge requires sites on one thing: the platform caps how many searches you run a day, and the churn on new sign-ups suffers for it. The requires sites angle is worse, because half the frustration disappears once you report problems early instead of blocking quietly. If check sites is your priority, how well it works on a weak connection beats the price tag, having tried a handful of these.
Same story on check: it is worth checking how much sits behind the paywall before you look at the number of features listed. What finally clicked for me about dating website for professionals was that what decides it is the number of live users, not the app store rating. What am I missing on requires sites?