Anyhow. I'm sending you all canes, so you can shake them as you tell the kids to get off the lawn.
I did A&R for a major label; I was fortunate enough to have interaction with many, many artists who were (still are?) 'big stars.' Here is what I know for sure that may add something here.
1. I never once met an performer / talent who thought ahead to sales as they were creating. Ever. During post-production? Sure. While sorting through marketing plans? Yup. But even with the most mercenary of artists, I never once saw them sit down and say "now, what would sell the best?" Careful note: I have seen them create out of ego, but artists who do this see the money as their entitlement ... because after all, who wouldn't want to throw their money at them?
2. Almost all people who entertain notions about "selling out" are fans who (being kind here) want to feel 'special' for being a fan of something.
In fact, let me just plunge ahead and trash 'snooty fans' (the type who think Slint are amazing, but can't stand Taylor Swift). I spent way too much of my life around such people; such people are wretchedly unable to see that they have developed their musical palettes to flatter their own sense of self. Frankly, I've never seen a more pathetic yet narcissistic bunch than 'music snobs.' They are infinitely more unbearable than the most enthusiastic of Richard Marx fans.
Careful note #2: There is a huge difference between being passionate and opinionated, and being a 'music snob.' If unsure of the difference, please meet me at an LCD Soundsystem show and we will break it down with 10,000 examples in front of us.
Sorry, having flashbacks.
3. When you're as big as Taylor Swift, you bet you can be greedy or not-so-greedy. This is called moral relativism, and it's a real thing. Bruce Springsteen is not so greedy; Gene Simmons is a greedy pig. Artists this big get to call the shots, and one of the shots they can call is about how they define their relationship with their fans.
Careful note 3: This stuff really is up to her. And if you think <30 is 'mature,' I have some property in Florida you would love. Talent is always kept as immature as possible by those who survive by exploiting them.
As an aside, please feel free to start a separate thread about downloading. I'd be glad to participate, but think it's muddying these waters.