It gets confusing when payments to Cam4 models are described as 'tips'. For me, a tip is an unsolicited payment in appreciation for a service that's been given. Too many of them solicit or demand payments before giving anything. To my mind that's the difference between prostitution and just camming for fun. If someone shows their appreciation for your efforts by giving you a payment because they enjoy your room, chat or camming, then that's fine. Just don't start demanding payments for performing particular acts.
It can also be counter-productive. In my experience, the guys that are just there to demand payments do worse than those who actively engage with their visitors, just check out guys like Mansaf68 to see what I mean. I've seen him get 40000 tokens (that would be 4000 at the new rate) while staying fully dressed and just chatting at work.