I tell you, some weeks differ so much from others.  These past few weeks I have had 100% rejection from IS and almost 85% acceptance at DT.  A few weeks ago it was the opposite.  I've given up trying to figure it out.
On the other hand, the two images that StockXpert rejected after I uploaded updated files of already accepted images:  one was reversed and accepted again, the other is still rejected for "artistic reasons".
rosta

yeah, I've almost got time travel figured out, but I'm not even close on figuring out  acceptance/rejections.

Don't  try to figure it,  rosta,  you will only hurt your head...  LOL   I've found it easier to understand quantum physics....     -tom

I've always attributed this to the Heisenberg Uncertainty Principle, or observer effect. 

When I submitted a photo that I thought was fine and had it rejected for background problems (actually the background was a pebbled black surface) and then I "fixed" it which made it flat and looked like crap... it got accepted.

Still so much to learn about this game.

I haven't even tried to get a 35mm film scan accepted. It looks like I'll have to make precise manipulations in the scan and Neatimage to avoid any grain, and cross my fingers.