While I admire Musk for what he is accomplishing, I would not trust him with my IP. I don't think that he would out and out rip anyone off, but the deal would probably be fantastically lopsided.
With Dyson, I get the feeling that he doesn't want to rip off any engineering types as they are his people. He probably knows all the stories of where the business type and the engineer with the brilliant idea meet and somehow the engineer still can't afford a good soldering iron, yet the business type just bought his second European Ski chalet, There is no money for some new lab equipment, yet the business guy's frat boy son was able to earn enough money in his part part part part time job in the company to buy a mid line new BMW before returning to his $60,000 year school, also paid for with his summer job savings.
While the typical engineering type usually does not have a pile of business sense they do know that when they venture into this area they are swimming with sharks. I think that many just keep their heads down and don't bother getting ripped off, or they try to do it on their own and don't have the business savvy to get anywhere.
Thus I predict that a venture such as this may very well have a very positive outcome as the solution is probably sitting in some engineers mind just waiting for him to bother brining out for us to enjoy.
One other bit is: Notice the word engineer, not the word scientist. Maybe he realizes that world is bound up tighter than most bureaucracies, that throwing money into that world is basically giving boomer senior professors some more money to explore some dead end idea they have been poking at since grad school in 1973,