GitHub maintains a list of all DMCA takedown notices along with counteractions and retractions if any.
Analysing all the notices from 2011, it seems that the takedown notices are on the rise.
Year View : Notice the sharp increase in 2014
Quarterly view : Now looking at the quarterly breakup, seems like the takedowns are cooling off in the later quarters.
So who is issuing these DMCA takedowns?
Here is the complete list of all companies who issued DMCA takedowns
NOTE: The names were extracted from the description text
And here are the counteractions and retractions
So the important question is “Why the DMCA takedown notices have increased?”
One important thing to note is sites like Stackoverflow encourage to replicate the content of the web page from where the original idea/algorithm or source code is copied from. To be honest it is a good thing because lot of times these referring sites become zombies and you don’t want to lose this knowledge. But could it be the case that such non-referenceable source codes end up in GitHub and hence causing the increase in the takedown notices as companies start discovering them?