That’s am interesting point of view on the never really settled arguments between copyleft and non copyleft software licences.
http://m.slashdot.org/story/297041
He says, “I am not only pro-copyleft, I am also pro-permissive licensing. The difference between these is tactics: the first tactic is towards guaranteeing user freedom, the second tactic is toward pushing adoption. I am generally pro-freedom, but sometimes pushing adoption is important, especially if you’re pushing standards and the like. But let’s step back for a moment. One thing that’s true is that over the last many years we’ve seen an explosion of free and open source software… at the same time that computers have become more locked down than ever before! How can this be?