what you're basically doing is thinking, from a macroeconomic scale, about how certain actions affect the economy of steemit.
I've been thinking something similar lately - with things like the Appics ICO, whether that would affect the price of steem... afterall, the minimum purchase for this ICO round is $5000 USD - so it would mostly be whales that would be cashing out some of their steem above this amount, which would essentially be pushing down the demand of STEEM (though if it gets transferred to appics and they keep it in STEEM, then at least they aren't pushing up the supply at the same time).
Same could be said of EOS, as it would be closely linked due to the relationship of sharing the same founder..
in the end of the day the whole crypto market is very closely related - money goes into the market, all the coins seem to go up and down together...