No wagering deals are a risky tactic. Bingo sites use them as players clearly love them and will flock to that brand in huge numbers. But it is important for the gambling operator to assess the potential damage of such a deal when it comes to their financials. Wagering with bonus cash makes it fairly likely that a player will simply spend that money throughout the course of the wagering. But when the wagering is taken away, so is the possibility of clawing back some of that cash for the bingo site.