If your question is a sincere one, then you're asking, of employees who have been approached by companies via OS contributions, "why did they do that when they

If your question is a sincere one, then you're asking, of employees who have been approached by companies via OS contributions, "why did they do that when they could have got that work for free?". Hearing from employers who have done this might be interesting, but I'm not sure that the employee would be the right person to ask. On the face of it, however, to me at least it reads like your 'question' is less interesting: a rhetorical restatement of "companies don't do this". Then the 'evidence' you offer is an invented just-so story. Like all such stories it reflects your response to the world and the domain of your imagination, but tells us nothing about the world itself. It's a plain empirical fact that companies either do this, or they don't, and you find out which is the case by examining reality, not by weaving tales. Telling stories to assert that the world 'must' be as we perceive it is common but without worthwhile uses outside of debate halls.