For Xiang Shan, purchasing shares of the game company Action Master meant that he could leverage the prestige and channels accumulated by the gaming company to strengthen Superman Enterprise's influence. He could advance a series of cognitive science research related to gaming, and even freeload on the computational resources of AM players.
Compared to the expensive construction and maintenance costs of supercomputers, the money spent on acquiring these shares didn't seem so costly.
And if necessary (for instance, if one day computational resources were no longer scarce), he could sell the shares again.
As for making a loss... cough cough, at this stage, Xiang Shan didn't need to worry about that at all. A few words of public praise from Xiang Shan for a company could possibly make its stock price jump a bit.
In the eyes of the wealthy, whatever company this technical upstart invested in represented a promising opportunity in the current era.