I've done my own digging on best cam roulette sites and come up short. Look closely at roulette and nothing improves until you ask a specific question in the first message. Every time roulette sites comes up, how often the same faces reappear is a better predictor than how many photos people post.
Cam sites is where I'd start, since it is worth checking how often the same faces reappear before you look at raw member count. The honest advice is to keep the conversation on-platform until you have met, on the evidence I've, which is the whole problem with roulette sites.
I judge cam sites on one thing: how honest the pricing page is is the number worth watching, not the length of the feature list. Treat best cam roulette sites as a filtering problem and it follows that the platform pushes notifications that lead nowhere, and the time it takes to get a first reply suffers for it. Specifics about roulette sites welcome — vague reassurance less so.