Hi all.  I have been dipping my water deeper and deeper into the microstock world and thought I had a few things figured out.  Such as:  it took me forever to get just 2 photos accepted on istock.  But BigStock, then fotolia, then StockXpert then DT ans 123RF all accepted me.  It was clear sailing as I recognized my "loser" photos and slowly started to upload my meager portfolio.  Then BigStock started on a rejection kick (or so it seemed to me).  For a while I had no trouble getting things accepted at fotolia, StockXpert and 123RF with a little trouble at DT, still not getting very far with IS. 
Now things have changed yet again..BigStock has stopped rejecting me, IS is accepting my work and it's DT that is doing the rejecting.
Is this something that others have noticed??  Dose everyone who uploads to multiple sites find a pattern?  I want to stay with multiple sites until I find a style that is "me" and meshes well with a site  as proven by acceptance and sales.

judy