Social clans daily recommendations question

[Captain WeebM@ster]

How do they get decided, and is there a point at which a clan won't get recommended? i have a clan that i put all my alts in to have a constant idea as to what their pvp ranks are like and now with gunner added I wanted to put him in there as well but i can't find it anymore. clan is not full and has 79 players in it. what do ty