When Soulja Boy came out Kanye was doing the "Superman" Nicki comes out.. "Shes One Of The GOATS".. Bieber blows up.. Kanye tweets him about how much he loves his album.. Banks gets some hype "He's in the top 5"..
Your right though.. Kanye is Sitting High..Pardon me I just find it a little funny..
In pro wrestling, there's a term called "putting over", where a vet lets an rookie win, or they cut a promo co-signing the rookie. All Kanye is doing is putting them over and giving some buzz. In return if that buzz works out, they'll look back and want to work together. Soulja Boy's buzz went up his nose, literally. Everyone else he's followed through and collab'd with.