Is S.MG going to focus on a certain niche of games (beyond using Bitcoin)?
Not so far. In general specialization occurs as a result of competitive pressures. There being no competition, specialization doesn't make sense at this point.
Isn't this just another way of saying that there is no business plan whatsoever?
No. While I appreciate the stubborn display of "she couldn't possibly have meant to say we're not good enough", that's exactly what is being said: that there's no perceived benefit on MP's part of discussing the business plan here. You are cordially invited to open the eyes and ears and shut the mouth, basically. Take it as a learning experience, this is how things are done sort of thing.
I wouldn't mind investing based solely on the reputation of a CEO, when said CEO is someone like Elon Musk (obviously that's what happening with SCTY and TSLA atm), or even friedcat (if we want to keep it at bitcoin level), but I don't think MP has this kind of reputation or track record yet.
You may be entitled to your own opinions (maybe, if you prove you can form strings that aren't self contradictory), but you are certainly not entitled to your own facts.
Perhaps if this venture does well on the middle to long run, and if he wants to start something else in a few years, the he could consider doing it this way, but right now, even the with the "relative" success of MPEX, it seems presumptuous.
This misapprehension seems chiefly the result of you being new around here, and so your perspective is flattened on one end, the so called "more than 100 years ago" effect. There's nothing wrong with that: if you manage to survive in Bitcoin on the middle to long run your estimations of things will necessarily change to better align with reality.
Which reality has this unspeakable way of being "presumptuous".