Just as you say, as BTG, BCC, ETC, etc., have shown.
Given that Steem can be easily taken over with Mark Zuckerburg's lunch money, a platform considering using SMT to monetize content creation has to consider that their platform would become vulnerable to that takeover.
I have discussed this at length in prior posts, and in correspondence with folks at Stinc as well. Despite some assurances that this would be at least discussed, I haven't seen it happen.
A problem is that the founders' stakes are the ones that would be necessary to buy up the witnesses, and such an attack is basically a golden parachute for them.
For us, this is a problem. For them, it's a feature, and business model.
As refugees from Gargle, Fakebook, Twatter, etc., come here, the value of Steemit to oligarchs increases, and the likelihood of such a hostile takeover increases. SMT is potentially a huge increase in the value of Steem to censors, propagandists, and the like, as it may increase the number of platforms that can be controlled with the investment.