Why? And dont you sort of know the population skews a certain way given the platform you choose (guessing quora differs from bing which differs from coupons in

Why? And dont you sort of know the population skews a certain way given the platform you choose (guessing quora differs from bing which differs from coupons in the mail)? Restated, and this might be so off base and tangential that maybe it's not worth answering, but if you were say....something reasonable like a dentist. And you were fairly far along in your practice and had tenure. Let's say in that case your "list" represents a fairly not insignificant amount of the people around you. Say 5%? 10%? Whatever is reasonable. Even in that case the algorithm is better?