Honestly, I don't follow predictions of the said sports gambling experts but I do read their analysis about the game. It's really helpful to see who are missing in the game and who might play that could be a big impact to the game.
After that, I do my own analysis and I'd be happy to predict the results of the game on my own rather than relying on someone else who thinks they are good at predicting the game. Reality is, there's no assurance with their own predictions because the game cannot be controlled by anyone unless there are circumstances where they need to lose because of an important reason. i.e. Draft picks lottery (tanking)
Yes many gives prediction in their telegram groups maximum time they give sure win but some time they fall the followers in loss why because when we in loss they predictioners get profit if the accounts creat from their refarence link. No one is your in this game thay come hear for earning that's the reason don't trust any one do your own analysis and make you own win and own losses that is more peaceful more then follow others.
I have heard that before and several times not all about the money, because many of those telegram groups will at the end ask you for money as in fees to give you those so-called sure bets, this has been a known scam that has been happening for a while now and if one is not well knowledged you may be easily deceived into thinking that something like that exist, in gambling there is no sure games because every session has its implication and realities and those are the factors that determine the outcome of the game.
That is why we must not have such a mindset as to have a third-party bet speculation and how best we trust or use them but better if you must use them, you shouldn't waste their money in paying for such services.