Honestly it seems like a win-win. Anyone trading on the information is likely to be caught and I doubt they want someone in a position of power who would commit that sort of crime.
As far as I can tell the company isn’t legally or financially liable so I don’t see a downside?
Aren't Netflix essentially enabling market manipulation (which insider trading technically could be a part of) which surely must violate some sort of legal codes (maybe even for the directors of the company! I.e. in Australia we have laws around "Director Duties" where as a director can be held liable for all kinds of behaviour when it reaches a certain scale incl. honesty, debt, insider trading etc.)
As far as I can tell the company isn’t legally or financially liable so I don’t see a downside?