That's not about copyright actually. The license is a contract, and you decide to sign it or not - by deciding to use the software or not. The contract in theory may include any restrictions you can imagine. There are in practice some restrictions on that restrictions by some laws in some countries in some aspects, but rarely about KLM.
Copyright license and contract are not (necessary) the same thing. An important related fact is that contract breach is generally less penalised than copyright infringement.
