I keep going round in circles on figured out how to bypass the registration on sez and I'd rather ask than guess. With sez, the number of live users explains more than the length of the feature list, going by the last year or so. Look closely at sez chat rooms and the platform throttles your visibility unless you pay, so it pays to screenshot the pricing page in case it changes.
What decides it is how many first messages actually land, not the badge on the download page, which is the whole problem with sez. The sez case is instructive — nothing improves until you ask a specific question in the first message.
Nothing about sez changes the fact that the deciding factor is the reply rate, with the usual caveats. Strip the marketing away from figured out how to bypass the registration on sez and you get further if you screenshot the pricing page in case it changes. Specifics about sez figured welcome — vague reassurance less so.