Who made up the A-List, B-list etc. for celebrities, who decides who's on which ';list';, and how do they decide

I'd like to know who the all-powerful list holder is.Who made up the A-List, B-list etc. for celebrities, who decides who's on which ';list';, and how do they decide
The A-list is part of a larger guide called The Hot List that has become an industry-standard guide in Hollywood. Lesser-known actors inhabit the B+, B, and C listsWho made up the A-List, B-list etc. for celebrities, who decides who's on which ';list';, and how do they decide
idk who decides but they probably decide by who is the most famous and earns the most money.
even i would like to know all tht