I research the each DT category to find photos/illustration with largest number of downloads. You should read this blog with images, so see this blog.
In category Abstract
the best one is downloaded 578 times it is red velvet theatre curtains more like a background to potential contributor I think. Its ID number is telling me that this photo is one of first on DT.
In category Animals
we see swan with 193 downloads it is older photo then the red curtains.
red curtain is also the first so I choose second one and its carpet cleaning also very old on DT.
top seller is business meeting with 778 downloads (wow) its id number is also very low.
best seller is a map of world,
Computer work 336 downloads,
work place blur I think the oldest best seller on DT its number ID is 9067.
category is Smiling family on beach with 305 downloads and probable the youngest photo from top best sellers, I think it was uploaded in 2007 year (congratulation to Ron).
category we find golf player with 261 downloads and a long history on DT.
staff meeting also have been for a long time on DT have 564 downloads.
In category Technology
Blue globe with 200 downloads,
and in category Travel
beautiful blue beach downloaded 299 times.
I saw that all those photos except Ron’s are for over couple years on DT. They have many downloads and viewers. They all are on level 5 the heights level on Dreamstime. Most of them have not got the option of ‘sell the rights’ except Studio’s. Maybe my quick research will help somebody to get their own conclusions. My are that the time is important for selling’s and it is micro stock even if the photo is really popular it is cost maximum 8 credits for RF it is great for all contributors and for us.