Imagine sharing a link to a website with a friend, and that friend returns your email saying “I see you use Chrome. I’m a Firefox user myself so I couldn’t see your LOL cats. Bet it was funny though”.
That’s what it’s like having North American friends using Rdio and European friends using Spotify. It is a right bloody mess. Do you mean to tell me there is no way to convert links from one service to another?
Someone should look into that.