I remember when Spotify switched to requiring facebook for signup and were pushing linking the accounts on existing users. Perhaps it was a bug but at one point

I remember when Spotify switched to requiring facebook for signup and were pushing linking the accounts on existing users. Perhaps it was a bug but at one point they made finding and following other users very difficult without facebook integration. Apparently they switched back to allowing email signup again some time ago but it left a very sour taste in my mouth. I still have my account today so I suppose that's a testament to how well they've run their service outside of that issue. Anyway, I hope developers keep incidents like this Google one in mind and let people create standalone accounts. Certainly at the very least supporting more than one provider and allowing you to link another email address if they don't feel comfortable dealing with the very serious responsibility of managing and encrypting usernames and passwords.