Hoping someone here has actually tested if you had to rank them rather than just read about it. Nothing about rank changes the fact that the ratio of matches to conversations is the number worth watching, not whatever the landing page promises. Every time rank comes up, the gap between sign-ups and active users collapses as soon as the platform recycles the same profiles.
For five sites in particular, nothing improves until you read the newest reviews rather than the top-rated ones. Five sites is where I would start, since the amount of recycled content matters more than the length of the feature list, in my experience.
The rank five case is instructive — the platform pushes notifications that lead nowhere, and how much sits behind the paywall suffers for it. When it comes to if you had to rank them, the deciding factor is how many first messages actually land, going by the last year or so. Would especially like to hear from anyone who changed their mind on five sites.