UK Pirate radio had this too. If you liked a song you could upvote by calling a number, they could count how popular a song was by the number of missed calls.
YI wonder if that's where Drake (or one of his ghostwriter s) took the phrase 'hotline bling' from. Before his song I only ever heard that on late 90s pirate radio in London (to describe the Nokia screen lighting up with missed calls)
