Are there gambling sites which offer free signup bonus in form of mBTC?
I do not mean a deposit bonus or something like that, but a free bonus short after registration to test the service.
I think every casnio give free signup bonus for new account, but it's hard to withdrawal the bonus. I mean, you need do the wager xx times to withdrawal the free money.
Not all casinos gives sign up bonus/no deposit bonus, this kind of bonus is just like a promotion tools that be used to introduce their site. Of course it is not 100% free money because, as you said we need to wager xx times before we can withdraw it, mostly we will lose all the bonus before we meet the rollover. Only lucky players can earn something from no deposit bonus.