I am surprised that your focus is the bonus and not making money. If you continue moving from different casinos just because you want the bonus, you might end up having a bad experience over all because you should not forget that not all casinos are perfect. I am not saying that trying new platforms is bad but when it becomes your habit, you may even be tempted to try having multiple accounts which will cost you something precious. I will advice you to try chasing the real money and not bonuses.
That's the risk of changing new casino and there's nothing wrong about that.
Not all gamblers are looking for fun, some gamblers are looking to make money. Finding a loophole and take advantage over it isn't a crime, a crime is when you exploit something/modify something to steal the casinos funds.
Some people earn extra money by take advantage over bonuses.