Giving free signals are never what they really want to do. Their motives is always to get people convinced that they are giving them profits that is actually signals that are given a minute after the altcoin's pump and then posting the premium signals for a ridiculous fee of BTC.10.
Majority of groups just want huge number of people in their signals so that they can greed them by showing some signals and convince them to purchase their services . Also just check whenever they give signals the price will always be above of their levels and then they claim target achieved etc .