So, buy some xpm if you want cause price will soon increase as we get rid of the botnets at last!
I know very little about Primecoin and I'm doing my research... why do you say that having/getting rid of botnets affects the price? I can understand that it may have some effect in the image of the coin, but I can't see why price should move a lot.
Because botnet miners sell at whatever price, they don't give a damn since they don't spend a dime on hardware, power costs, nor renting servers...they are scum.
(like the pools that don't condemn botnet miners too...cough ypool cough)