Bonuses are usually done because gambling sites wanted to attract more gamblers with this. Sites didnt made this just to give away money but they also have it seen in the future. You cannot gambling in just depending on the bonuses you collected because sites knows it can happen and they can possibly have a system which has greater odds if you put your bonus money.
Indeed, we can't rely on bonuses that give on gambling site even if it is for attracting people that may encourage in doing gambling. Bonuses and affiliates I don't waste my time on these kinds of earning because they only give a small amount and it might need a minimum withdrawal. Deposit your own and enjoy have fun don't chase on a small number of bonuses.
only people who have the skills and can continue to focus on the game to be able to double the bonuses obtained from gambling sites. in addition to the skills and strategies it has of course requires a long time to be able to continue to double the initial capital obtained. but most people cannot do that, because bonuses are given in small amounts and are only intended to attract the attention of many people to be able to play on related gambling sites