Security researchers say the cost of criminal services such as distributed denial of service, or DDoS, attacks has dropped in recent months. DDoS attacks have been used to censor critics, take down rivals and extort money from legitimate businesses. Security researchers don’t know if that’s been a factor, but they do say that the supply of infected machines has been growing. In 2008, Symantec’s Internet sensors counted an average of 75,158 active bot-infected computers per day.”]
Source: https://www.csoonline.com/article/2124446/with-botnets-everywhere–ddos-attacks-get-cheaper.html