I've been with Dreamstime for over a year now.  My average acceptance rate has been 58%, and never more than 65% in any month.   All of a sudden, so far this month of March, with 21 submissions, my acceptance rate has jumped to 86%.   I don't think my photos have gotten any better.  Actually, I think my acceptance rate should have been this high all along    

I'm curious, is it just a fluke with my submissions, or are they getting easier for everybody?  Are they trying to rapidly increase the number of files they have on-line?