(because @steemit isn't using their stake for voting)
Have a look at @misterdelegation. It's an account controlled by Steemit Inc that has delegated out 8 million SP, with several more million to come. This, plus freedom's 7.5 million SP, and other delegation services means nearly 20 million SP that has hit the reward pool. The end result is net influence is 1/3rd what it was a couple of months ago, per Steem Power. The price is inversely correlated to this change, in fact. Of course, not causation, at all - that'll be the booming market and greater adoption of Steem in general. Indeed, the whims of crypto whales outweighs everything else. So if a burn or airdrop is favourable to them, the price will rise regardless. As for which method of the above (and others) they like best, I don't know.