It is a negative as it is creating a market for deception, by paying for it they are giving money to people who specialize in deception who otherwise would have

It is a negative as it is creating a market for deception, by paying for it they are giving money to people who specialize in deception who otherwise would have to do something else. These people will continue improving their abilities to take advantage of the borderline credulous who would have otherwise gone unexploited. Perhaps in the best case it is less bad than what other things they would have spent it on.