Hmm. I'm just gonna share something, I also tried those 'Deposit Bonus' of some site, and well, I found that, yes you can play longer because of the bonus, but to actually be able to withdraw it? They put a lottttttttt of rollover requirements that it's just so sad.

So, anyway I just now look at the HE offered and choose based on that, as well as the events held by the site, I find that it offers more chances for me to actually win some. Still, goodluck to you. (maybe you could get over the rollover)
