Ever looked at dporn? ( I of course only did for research purposes ;P )

The rewards there are very small and there aren't many videos either because of this.

And I don't see reasons why this would change in the (near) future.

So my point isn't that there shouldn't be services or accounts like that and I also don't think that such things will vanish completly. Its just that I find it very unlikely that these will ever be a majority. And also that one has to be very careful if using them...