It's also very valuable traffic to advertisers so they can pay out attractive rates to writers while also making good money being the middle man.
If Pinterest, Twitter or Tumblr were to adopt this model, it probably wouldn't be very effective because their traffic is (essentially) worthless on a micro scale.
If Pinterest, Twitter or Tumblr were to adopt this model, it probably wouldn't be very effective because their traffic is (essentially) worthless on a micro scale.