How much are they paying you for this?
None of these reasons are compelling enough to justify the price they're asking. Hell, a Netflix's subscription price hike is actually a more acceptable news than this. I don't go to Youtube for its "Targeted Contents", I have Netflix, Amazon Prime, and the new Disney streaming service next year.
As far as I'm concerned, Youtube and Google just haven't proven enough beyond "ad-free" streaming to justify charging for it. Their definition of "premium" is as laughable as this article.