For pro gamblers, a deposit bonus is a big trap so I am not surprised that you said you won't consider even a 300% bonus as a deposit offer same with me also, no matter the amount of the deposit bonuses that are offered, I don't consider them rather I focus on gambling with my available fund.
Trying to meet up with bonuses requirements is a pain in the ass of many and we should try by all means to avoid falling into that trap whenever we come across such offers.
Well, it used to be different, it was simple. We get a bonus, we have a wagering requirement and that's it... If we win, if we lose we lose. And there is fun in trying to complete the wagering requirements, we need to play a lot & we do it. Where is the fun? When I play with the bonus I usually start with a higher stake than usual, and if I am lucky to hit something at the beginning it can be a crazy gambling night.
As I wrote, lately the situation has been different, most casinos have bonuses, but there are a lot of traps, and some strange rules... that's a shame, but maybe some casinos will come up with the idea of offering a really interesting bonus, something new and different.