Micro Stock Photography. Your Opinion And Experience? iStockPhoto, Dreamstime, etc. You know them?

[Digitalidad 0]

Hi, photographers and designers! I discovered micro stock sites last year and I saw that in one of them artists were making quite a lot of money with their photographs and vector drawings, but later I found it was not so easy... or so fair... What's your experience? Do you know them? Have you had success there? Thanks in advance for your help!