I've never seen any company where I worked caring about back contribution. At most, you could send an email to the lawyers and wait and wait and wait any answe

I've never seen any company where I worked caring about back contribution. At most, you could send an email to the lawyers and wait and wait and wait any answer. That's why all my code is released only under the AGPL3, so that companies do not dare use my work without paying for it.