Your response here is in a different light then what I took from your orginal. If you are saying its in his best interest to help the STEEM token succeed then I would agree it is. But its his funds to do with as he pleases. If chooses to spend to help the chain grow then that would benefit us all including Justin Sun. That doesn't mean he has to ..... its his choice to choose to or not.
Thanks for the response and clarification on what you meant :)