Unless rich is a category variable and not a scalar. If he belongs to the category rich no amount of added money will put him out of this class. If one goes with the theory that society is tribal this makes perfect sense Perhaps the club he wants to be a member of is the one Zuckerberg is in?
I suppose this would be true if "rich" is the top category out of those available. For instance, there could be "rich" and then "Gratuitously rich," "exorbitantly rich," "foolishly rich." If we wanted we could represent these by income brackets; top 5%, top 3, 2, 1%.
this transaction 750 million of the 3 billion Facebook offered would put him in a high income bracket for one year and in the wealth category "folks who's wealth is around 375 million dollars". Richer than Romney but not nearly as rich as Huntsman So it would not put him to the top category so really it is not worth it ;) [edit dropped a not]