The short answer: Your PRO only collects half of what your song earns, often in just one territory or country. The long answer is explained in-depth here, but basically amounts to the fact that your PRO is only responsible to collect performance royalties in your territory or country, meaning you’re leaving your international and mechanical royalties on the table. Suffice it to say it involves registering your song repeatedly in more 215 countries and territories, collecting an entirely different kind of royalty, and a whole lotta blood, sweat, and tears. Make your life much, much easier — sign up with a publishing administrator like Songtrust (who’s network covers 98% of the global music market) today and head over here to learn more about where we collect.