Less of that, but more of the fact that Riot wishes to create distance between their brand and SBF. Considering that he is no longer considered to be successful

Less of that, but more of the fact that Riot wishes to create distance between their brand and SBF. Considering that he is no longer considered to be successful nor positively influencial, further association with him can only cause potential reputation damage. Once an influencer has become a liability and no more value could be extracted, the only sane thing to do is to drop them like a rock.