Have to say, I hadnt hardly heard of Fleetwood Mac, Stevie Nicks or this song at all before it was used in American Horror Story, and now Fleetwood Mac is my 2nd-top artist on lastfm. Don't knock promotion; I'm so glad they used it and I found one of my favourite bands!
Been one of my favorite songs for years, so they used it in AHS, what's the big deal if that's what brought in more listeners to this great track? People are ridiculous.  greedy freaking shits can't get over that there are people who didn't know this band before AHS and they are enjoing them now. Don't worry most of them won't remember this shit after AHS will end.