the best way to play at casinos is to not take the bonus, that way you are in control of the funds. The only exception to take is when the wagering reqirement is reasonable and the terms are conditions are favourable to both the player and the casino other wise i dont see any case to take the bonus.
Gamblers can take the bonus but they should check the requirements so they don't feel sad if they can not fill it. Many gamblers don't do this and just take the bonus and get themselves in trouble because they can not fills the requirements. They started to complain and even accused the casinos of scamming them.
That is why gamblers should be wise about all promos from the casinos and only take the promo that they think they can fill. Not many promos we can take.