Kudos for having good earnings on Cam4.
This is my personal experience as TS model: I split-stream on (by order of earnings) Chaturbate, Stripchat, Bongacams, Camsoda, and Cam4, and unfortunately Cam4 is last in earnings for me where I typically earn <5% of what I make on Chaturbate. I actually started camming on Cam4 9 years ago, and then I would make okay money—a bit more than I would make working a low-wage job (my only other option). There was a lot more American traffic as well. I stopped using Cam4 soon after I started in favor of Chaturbate, and only started again when I began split-streaming. IME, these days Cam4 seems mostly T2/T3 traffic. For every tipper, there's a few hundred "see my cam," "show tits," or "skype bb?" type of individuals. I've never sold a private on Cam4 since returning, though have on all the other sites and do almost daily on CB/SC.
I think the site has potential, but they really need to get with the times and improve their traffic. The UI is antiquated, their broadcasting window is too remnant of the Adobe Flash days in both aesthetics and functionality, and really it's just a pain trying to funnel sales without bots/scripts like every other site has. On the plus side, some of the features like awards and offline DMs are nifty, and I wish more sites would incorporate those. I've also met a few quality tippers on Cam4, so that alone makes it worth streaming to in addition to the others.