It's already been explained that the Alexa drop was caused by regional Paypal switching from
www.paypal.com/au to
www.paypal-austalia.com.au and similar regional sites around the world.
Don't make something out of nothing, all the Alexa stats show is that Paypal.com has dropped, it doesn't explain why and I have just explained why above.
Also, Paypal were investigating some of these sites long before Stop File Lockers began, in fact a couple of the bigger ones have revealed they were talking to Paypal from the beginning of the year.
We can't claim credit for some of the bigger sites, like mediafire or deposit files because those sites were already under active investigation by Paypal it seems. I don't know this for sure, but there is enough anecdotal evidence to suggest this is true.
Let's not kid ourselves, Stop File Lockers has made some noise, yes, but I think it's been just a case of timing in some cases.
ACIUF have been sending reports to Paypal on many of these sites for months, as have other anti-piracy groups. I think the sensationalism of the "One man Army" is ridiculous when lot's of people and organizations are involved in this effort.
Copy Control will be important to fight piracy, it's a tool the whole industry and those outside the industry can use and it will probably be very effective, however let's not kid ourselves here - there are other large organizations fighting these battles as well.