... And the benefits of going with a company like Tesla and their historically lightning fast commercialization schedules could pay big dividends to the sellers depending upon other guarantees or compensation they were promised in addition to the Tesla stock.
Bull case: Owners/developers know they could sell the tech to a Japanese company like Panasonic (or Korean, Chinese company) for $1 billion or more. But they know their participation in the eventual commercialization will not be all that meaningful, being over-ridden by the huge corporation's internal research and development efforts, further large financial gains may take years or not be that large. Perhaps they feel Tesla can bring their technology to market more quickly and this will cement Tesla's lead in the EV revolution and the value of the TSLA shares that they took as payment will soar and they will continue to participate meaningfully in the commercialization of their ground-breaking discoveries all while being associated with a company whose stated goals align with their values.
I recently learned that Musk, before he left the University, had a focus on super-capacitors so I would expect he has the necessary background to appropriately appraise new developments in this field.