I have made a several thousands of $$$ in the past from my images being licensed & still continue to get royalty checks in the mail a few times a year.
It seems with the growth of microstock industry & the current economic climate the RM sales have slowed down.
As most assignment photographers including myself would never think of submitting images to microstock to sell for a $1 or less there are hundreds of thousands photographers around the world making a living form this industry.
Our whole world & industry is changing rapidly on a daily basis & rather than turn our backs on theses things its important to embrace change & see where we fit in and can profit from such things.
Everything can have its place.