Even if a few of their signals turn out to be right, it doesn't mean that they are the ultimate experts in the sports betting industry. The research and analysis that they maybe do, can be done by an individual as well if they have an interest in a specific sport that they are willing to bet on.
The difference between paid groups and those patronizing them is that research and analysis which they have devoted their time on to do because they want to sell it out. It is laziness on the part of most bettors that make to to use such means otherwise if they put in time for more research analysis, it is the same result they will get and that is the result of winning some and losing some. No betting apps or telegram betting group gives an accurate result of 100% back to back, because it is not possible.
Another way of easy making money, trying to pretend that they are the one who are making the analysis but the truth is they are just buying subscriptions and make a good use of those shared predictions, if the pick wins then they will earn and with a good amount of winning picks or most of the time they will advertise more with the winning side and hide those fail bets, it's unavoidable that it will happen as there are many gamblers who will try to seek some edge to the point that they will resort it to a paying subscriptions and check for some luck that they will be paying for a profitable outcome, but still no assurance.
If there's for sure those who are involve will not just sell that information and got wreck, what I mean, if there's a group who are involved with game fixing, those people behind will secretly enjoy that and will be selfish to own that win, that's reality. Especially if in terms of anything that related to money, people are too greedy and will do everything to make sure that they will surely secure their winning chance.