Bob Bickel Founder, Ringside Networks alleges that the CPAL is a poison pill for open source code.
"The poison pill in this license agreement is that anyone using the Facebook code as part of something else, and puts that up on a website, would need to make all of the code open source," Bickel wrote .
First off the CPAL is a bona fide Open Source license approved by the OSI. It fulfils the requirements of the Open Source Definition as determined by the OSI and it is the Real Deal.
The ideal of contributions is pivotal to the success and long term survival of the Open Source community, and that shouldn't be thought of as a poison pill in my view.