Supposedly the purpose of those bots is to save yourself the time and the effort in exchange for some money that you need to buy the bot, personally I think bots can be useful but only if you know how to trade already and you can code your own bot, relying on the bot of someone else opens too many possibilities to lose your coins especially if you buy a bot from someone that does not have a long reputation of doing so as they could hack you and steal your coins, so for now do not bother with them as they are not the money making machine you may think they are.