One problem with GPL2 and GPL3 from an anti-capitalist perspective is that there are lots of ways for capitalists to satisfy the requirements of the license and

One problem with GPL2 and GPL3 from an anti-capitalist perspective is that there are lots of ways for capitalists to satisfy the requirements of the license and still make a big pile of money off of it, with the owners of the company pocketing most of the returns. Worse still, the original authors aren't being compensated. GPL mostly helps with freedoms for the users, which is still very useful.