That's not like that at all. As far as I understand all answers doctors give are open to the public on the site, so everyone else on the internet, including other doctors, can read them and say if it's a good answer or a bad answer. I imagine if this sites starts issuing bad advice, no one would want to go there. However, as of right now, it appears you are wrong and answers are getting paid for by willing customers.
Now, this idea may be far from perfect. But comparing it to the existing system while having a blind faith in it is wrong. In our existing system patients don't have many options of checking what their doctor tells them; they are referred to doctors by other doctors and very often have no way of checking on the reputation (% of successful operations this doctor conducted, for instance). The current system is very inflexible and not consumer oriented at all. Consumer interests are sacrificed in the name of their supposed safety, without first giving said consumers options to decide what they actually want and consider safe.
Now, this idea may be far from perfect. But comparing it to the existing system while having a blind faith in it is wrong. In our existing system patients don't have many options of checking what their doctor tells them; they are referred to doctors by other doctors and very often have no way of checking on the reputation (% of successful operations this doctor conducted, for instance). The current system is very inflexible and not consumer oriented at all. Consumer interests are sacrificed in the name of their supposed safety, without first giving said consumers options to decide what they actually want and consider safe.