Sort:  

That burning for promotion means advertisers have a reason to buy a lot of SBD so as to have tokens by which they can advertise on Steem as a whole going into the future. Promotion as a function hasn't been developed out to it's full potential but that is because we don't even have a million users yet. Developed to it's full potential then how much could SBD be worth?

Ok, it sounds speculative and I have a healthy scepticism that it could be the root cause of the pump, but I'll concede it's possible. Let me sleep on it for a while and see if I can come up with a way to validate or quantify (or debunk) the theory.