Acquiring some stakes does not mean taking over management, the exchnage is still managed by old people. After all, the stake buyer is the oldest bank that may have been a trusted service to local residents for years. Of course it will give a special impression.
Talking about profit, it seems that the bank made the right decision. I saw their coin price
grow by 125% in the last 24 hours. An instant profit.
Well, if you acquire a decisive majority in a business you essentially also control the management. That is just how equity works. If you have the biggest say in a company financially, you can just fire the management if they don't act in the best if your interest. The management knows it, doesn't want to get fired so mostly they serve your interests. That is also duty by the way to some degree and that is also why there is the separation of management and control, which eventually boils down to management being controlled. By whom? By those who have a stake in the company big enough to substantially raise their voice and take influence.