/vt/ - Virtual Youtubers

Genuine question because I don't really watch the JPs much outside of listening to their covers; is there a reason why they refuse to use the FREE TRACKS given out and instead opt in for these shitty outsourced tracks instead? Everyone in Holo seems to do it and it's always a coinflip as to whether it's "ok" or not.

For example, Nene recently covered Tokyo Shandy Rendevous, right? The track is horrendous, but look at the original video [or just see pic related] and they literally give out the instrumentals FOR FREE. It's the same with Suise's Cinema which is also horrid. I just don't get it.