From the Ars Technica article it sounds like this evidence was introduced in defense of Hotfile. You're most likely right -- hotfile doesn't have the resources to pursue this as a counterattack. However, it could be used as a successful defense in their current case, which could help establish it as part of case law.
"Hotfile has also tried to turn the tables by arguing that one of the studios, Warner Brothers, has itself violated the DMCA by issuing bogus takedown requests"
"Hotfile has also tried to turn the tables by arguing that one of the studios, Warner Brothers, has itself violated the DMCA by issuing bogus takedown requests"
[http://arstechnica.com/tech-policy/news/2011/11/warner-admit...]