Comment by commonlisper

No license is going to be suitable for everyone. You might think BSD, MIT, WTFPL are the most liberal licenses but they are not suitable for me. If I am invested in an open source software enough to contribute code to it then I want that when a greedy company takes that software and improves it and redistributes it they are also forced to release the source code benefitting everyone. BSD, MIT, WTFPL can't do that but GPL can. No license is a silver bullet.