But you're assuming that use of steem will have no impact on general awareness of bitcoin or crypto in general. I've yet to understand how this does not compute in the minds of bitcoin maximalists (not saying you are or aren't one).
Also, arcades were a killer app for fiat.
I DO understand that; I mentioned the two would have overlapping users partly for that reason.
Calling Steemit Bitcoin's "killer app" because its an on- off-ramp to fiat, would make Bitcoin the killer app for basically all altcoins.