Well, Taylor's song isn't made for chart positions, it's made to raise money for cancer. If she waited a few days the people who'd seen the telethon could have forgotten to some extent by then...and she would have looked shady. "Hey people, help me raise money for cancer...but not immediately, because I want my song to do better on the charts, okay?"
$9.99/month for Spotify Premium. I think there's some sort of lessor version that's $4.99/month, but I use Spotify because I like streaming music on my phone, which is only available for premium users.