I recently noticed that Merchant Sites are suffering DDoS attack comapre to other sites. Is any special reson behind it?. Last week worlday had problem and end of last month Authorize.Net.
Prolly something like what foonet did (I think a thread on this posted on whc) where a competitor DDoS attacked a company to try and stop their competition.
In a lot of cases these are russian gangs that are trying to extort money. Many of these ddos attacks are pre-empted by threatening emails and a couple of phone calls - then the attacks start.