You don't have to use the same account for everything.

I have one for social interactions with all privacy settings maxed out (including opting out of the Facebook platform [0]), and one for apps, with no friends.

The same goes for Twitter. http://twitter.com/loganloginski

[0] Otherwise the apps of your friends have access to your data.

It's against the Facebook ToS to have more than one account.

Facebook recently caught up with me and all of my "fake" accounts.

That assumes there's no way to (or interest in) linking accounts.

I choose to vote with my feet and not get a Spotify account at all. I don't want to support a company that strongarms their customers like htat.

Luckily I signed up for Spotify soon enough after they came to the US that I have an actual Spotify account. I probably wouldn't use Spotify now if I had to use Facebook to sign in.