Nowadays there is hardly an online casino which does not advertise with an allegedly attractive welcome bonus. The main aim of the gambling providers is to increase the number of members. In view of the constantly increasing number of online casinos this is no mean feat. To be able to survive the market, the providers must set their services apart from that of the competitors either by providing an exclusive game portfolio or with a lucrative bonus offer. As a potential player one has the privilege to choose the favourite provider and receive significantly higher bonuses then previous times, when there were less virtual casinos. But watch out: There are a number of pitfalls which could be the downfall of inexperienced players.