The mastered is sounding its best as it is as a beat, so it sells, you send them the mixed version so that once they add their vocals they can master it for themselves. If you send them the mastered version it will make it difficult for them to master it again.
I got much love for game of busyworlsbeats watching his videos really helped and taught me to use so many things in fl studio... im curious, does game have ANY major placements? golds or platinums?
Yeah cause when you master it and make it loud with mad 808s the singer vocals wont fit with the music so when you sell the beat you need to makesure the vocals of the person can match with the beat or can fit in