In order for online casino providers to attract your attention and, more importantly, your dollars, they’ll use the greatest asset they have to entice you. The welcome bonus. In the online casino world, this is the holy grail. A promotion that lures users in and seeks to keep you as a loyal customer for months and years to come.

On the face of it, an online casino welcome bonus is a win/win thing. For the customer, it’s the chance to get some free cash to play with, and...