I've been in some nice betting groups in the past where the tipsters were actually good. Nowdays I have the feeling everyone is trying to be a tipster (even when they are bad)
They are just doing guesses and gambling with people's money...
There are lots of such kind of groups. There are lots of paid groups with predictions. There are some groups where you pay a percent of the profit. These groups differs. When no one has interest in your winning - no one cares about predictions. In group where the owners are interested in your profit - they are interested in high quality predictions. I was in such kind of group and got every month profit. The problem is to find such groups.