I am about 200 dls from Emerald myself (with EastWestImaging) and will be requesting all files get upgraded to a min price of 2 credits. I expect to see at least 1.5x income, if not closer to 2. If the file is what the client is looking for, I can't see why they wouldn't pay 2 rather than 1, or 4 rather than 2 etc..

I have only uploaded 650 images out of 8000 on the site so pleasantly surprised. Don't think I will bother uploading the rest but this is a nice bonus. Pays for my gas this week!