Comment by manquer

Nobody was asking them to give indemnification or grant the license. Each of the potential holders just need to put it down on paper they aren't going enforce rights if they had any, not give the developer a complete license to use. Second can incur liability, first is pretty common clause used in many settlement agreements.

These things typically only work when you are well connected to senior management in these orgs, the ones who can sign off on such one-off requirements. Business processes are designed for the 80% of use-cases. More often than not, we end up hitting a wall with any long tail/unique requests.