Sometimes the DMCA is quick and other times they don't show until a 4 to 6 weeks have gone by. I'm more inclined that they wait till a certain number of images are placed then they're removed in one sweep instead of mulple times ass before. Those takedowns are likely costly of they do a lot of them.
The reason is obvious we don't allow uploading attachments on Cam Caps directly is from DMCA removal orders. Let the third part hosts handle the headache or the removals, we have had our fair share of them in the past and we all know what happens to servers if they're boggle down with to make takedowns, eventually the host just pulls the plug and everything goes offline until another host is found.