GPL is pretty much a "it's the right thing to do" kind of license. GPL violations are widespread and the terms are rarely enforced. Even when they are, in 99.9%

GPL is pretty much a "it's the right thing to do" kind of license. GPL violations are widespread and the terms are rarely enforced. Even when they are, in 99.9% of cases there are no penalties(unlike most commercial licenses), just a requirement to publish your code and adhere to the original terms of the license.