MPL and EUPL don't make you money but they are in the spirit of free software while not being viral and forcing everybody to buy into the socialistic ideals of

MPL and EUPL don't make you money but they are in the spirit of free software while not being viral and forcing everybody to buy into the socialistic ideals of free software. A company can keep closed source their own extension to your project, but any modification to the project itself gets shared with the community, no exception. In ways it's more libre than GPLv2, without forcing big money to bend to your idealistic will (because they won't, and will just avoid using your software). Of course you can write your license, but either you do it seriously and pay $x,000 a lawyer to do it for you, or you write legal nonsense. In both cases the result is any company will just skip using your software because they have better things to do than review your custom license. There is a real people choose pre-made licenses for open source.