Adding a bit of salt to the problem of botnets and the topic about "Attack as a Service (AaaS)" (not sure if the term really exists) this note is intersting:
Study finds the average price for renting a botnet
http://www.zdnet.com/blog/security/study-finds-the-average-price-for-renting-a-botnet/6528
"Based on an experiment conducted by researchers from VeriSign’s iDefense Intelligence Operations Team, involving 25 different "rent a botnet" underground marketplace propositions, they were able to conclude that the average price for renting a botnet is $67 for 24 hours, and $9 for hourly access."
Some other articles about bontnets:
The attack of the opt-in botnets
http://www.zdnet.com/blog/security/attack-of-the-opt-in-botnets/6268
The biggest cloud on the planet is owned by ... the crooks
http://www.networkworld.com/community/node/58829
