There are some guys who want to play "rescue the maiden" by tipping small amounts to a model who doesn't make much to begin with. If said small amounts total up to a large amount, suddenly, those members feel their 20 tokens is lost in the sea of tokens other people sent. They go elsewhere. So when you get too many of the people whose reason for tipping is that you're not a big-time model, you get too close to a big-time model for their comfort, and they leave.
The really sad bit is, they can't give you the chance to prove that you're not like other girls, for the same reason we can't give guys the chance to prove that they won't be the one to scam. They leave before you have a chance to stop giving such a big thank you for their 100 token tip as you used to.
The important thing is to keep going. Other people will find other reasons to tip you.
Also, 1880 camscore is not that bad. MFC claims that 1,000 is average. Know what average means? It means that roughly 50% of the people are not as good as that. (It's not exact, if it was, that would be the median). The real average camscore is somewhere between 800 and 900. Which means you were doing more than twice as well as the average camgirl.
At this point, since you did take the break, I think the best thing you can do is get on camera with a goal of having fun. Whatever you find fun about it, that's what you're trying to recreate each time you're on. Vary it so it happens in different ways, but go for it! Try not to let it bother you when people decide to wander off. Most of the ones who were keeping you company will stop back in at some point.
MFC allows you to turn off privates, and I think to turn off groups, so you don't have to be 1-on-1 with anyone who hasn't proven they don't care about the sex aspect. It's okay for you to never masturbate on camera. Just have it in your profile that you won't do it. People will still ask for it, you say that you don't do it. If the same person asks again after you already said you won't live specifically to that person, type it to that person (assuming you said it out loud), because maybe the person doesn't have sound. If they still ask, use both the ban and the ignore button.
If you do have private and/or group open, you can press the "decline" button. If you end up in one accidentally (when typing, windows takes the spacebar or enter button as pressing whichever button on the pop-up is highlighted. I just wish the programmers would make it the decline button instead of the accept button...), type in chat "I'm sorry" then end the show real quick, unless it's a private you want to accept. Remember- it's okay to say no, and it's okay to ban anyone who doesn't take no for an answer. In real life, if someone doesn't accept no, it's harassment at the very least. You don't have to put up with that.