See, for me they're a lot like the New York Yankees. While they may win in the regular season quite often via buying a roster, the inability to farm homegrown talent makes them a risk outside of that. Add in the fact that each team has had their own "homegrown all-star" (regi being derek jeter) and the white/black colour scheme, and they're almost a perfect fit.
If TSM really wants to do well internationally, they can't keep buying talent. Most top-tier teams tend to have a core of players while only subbing out 1-2 players tops per year. C9's been doing it, SKT's been doing it (with their "free agents" apparently being paid upwards of $800k per year in an attempt to get the Belichick effect going on), even Fnatic's kinda been doing it even though their success in spring was shite at best. While TSM's plan works short term (as NA is such a dearth-ey region that you can rely on skill alone and finish in top-3), the lack of chemistry combined with what looks to be a somewhat lackadasical coaching staff has them faulter massively against better competition. TSM almost desperately needs either a bigger roster (get a bunch of subs to learn underneath bjerg/others) and/or a revitalized coaching staff, as few people remember the domestic accomplishments when the teams in question get destroyed at worlds every year.