This option simply means that you do not own the track. When you listen to r&b beats or rap instrumentals you automatically get excited because you here yourself recording a hit but slow down cowboys and cowgirls.
If you are planning to record a demo after you listen to rap beats and you are not going to get this demo mastered or shrink wrapped or anything that serious just lease the beat.
Why would you want to spend the cost for exclusives when you are going to sell this out of your trunk as a mixtape or give it away to people for exposure. You know people like A&R reps. The song you are recording is strictly for a talent show, A&R showcase, mixtape or PR stunt. you don’t really plan on spending any money marketing this song so just lease the beat and save some money for now. Otherwise it’s not good business sense and I wouldn’t do that to you.