All of these things are true. But they need to be of sufficient magnitude over simple, zero knowledge about user recommendations to warrant ongoing cost. For t

All of these things are true. But they need to be of sufficient magnitude over simple, zero knowledge about user recommendations to warrant ongoing cost. For the space I was in, recommending hotels, the incremental value of the use behavior was minimal. On the other hand, getting the zero knowledge version working really well was worth an extra 11.6%.