DJ Khaled is a glorified agent. His contributions on the songs he's featured in is having the number of the actual artists (which let's be honest, a lot of them are industry plants to begin with) and convincing them to do a song with someone else. Notice how he is never in a feat with 1 other guy, it's always at least him and 2 other people.

The one thing he did differently was that isntead of just taking a payment for placing 5 calls total, he says "dj Khaled" once, gets on the artist list and gets royalties on that song.

Half the stuff in mainstream music industry seems to be about using connections and marketing to get memed to the top. I wonder how much exactly the unfunny memes of DJ Khaled saying "another one" helped him get so popular.