$20 consideration for reducing legal ambiguity around code they already own. Even if it's almost guaranteed to roll in favor of the employer, simply having to litigate it is enormously expensive. Such litigation would be detrimental to everyone but the lawyers, but that won't stop people from thinking they have a case.

I'm with you, companies will always look out for their own interests, but when clarification minimizes logistical waste, it's possible to benefit everyone.