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.
Bonuses was just a promotion aspects that attracts more players to bet for. The most important thing that will surely provide every gambler a chance of winning is through sports betting skills, because it would give you such ideas on where to the best teams to pick for. Enjoying the game and winning by analysis is a great achievement.