MCNs have always linked their adsense accounts (since the moment that program started). The relationship between AdSense & an MCN is different between the relationship of a creator & AdSense, but essentially they achieve the same things.It doesn't matter, couse since of april, YT said to MCNs that all users needs to have adsense now. So if you go with MCN, you are just getting paid via their adsense account. It's the same stuff now.