There are many free trusted bots such as seuntji bots and mydicebot, it does not cost you anything to use them. You can even create your own bots if you have the skills, so I have no idea which bots that cost you some money to use them. Bots has nothing to do with winning or losing, it is all about extra features where you cant find in the casino. I'm not surprised why there are people who like to use bots, because they like it for some reasons mostly because of its extra feature and speed.
I think it has something to do with bots being associated with cost that people fail to realize that they can create one. The beauty behind these bots is that you can set the parameters on the minimum/maximum bets you can put and automatically use it to save yourself some time. Technically, gambling bots are used mostly by gamblers who are profit-driven since they let the bots gamble for them.
Gambling bots should be beneficial but it carries a lot of risk to the gambler himself since the latter does not personally see what is happening on the game.