Yes I've never seen an employer sign such an agreement above. They'll either buy it off the shelf, or built it in house. Why would they enable an employee to leave to build a product externally to then buy for an inflated price?
I have. If you’re good enough and have decided to leave because you’re bored, this is one way the org can still retain your services and better, if you succeed, they have diversified into one more adjacent problem space with the investment in your startup.
