> So, they can sell their competitors (in shopping business) the impressions which never convert while selling the impressions which are highly likely to conver

> So, they can sell their competitors (in shopping business) the impressions which never convert while selling the impressions which are highly likely to convert to their own shopping business. If they do that, then their competitors should notice and then pay them less for giving them bad impressions, so they're just taking money out of one pocket and putting it in another. This scenario only works out if their competitors are less competent -- but in that case, seems like Google would do well?