Yes we thought of that too, but the list of the most popular websites can be long, and the frequency at which these websites changes can also be high. So it's n

Yes we thought of that too, but the list of the most popular websites can be long, and the frequency at which these websites changes can also be high. So it's nearly a fulltime job. We prefer to rely on our semantic backend, but if we implement a crowdsourced method, I think it would be more to spare computing power than for the quality of our results (which are already quite impressive).