Rdio got in ahead of Spotify’s expansion announcement last night with its own news of global growth. The streaming service added 20 more countries across Latin America, Europe and Africa, taking its total to 51 countries. That sparked a cheeky boast in Rdio’s announcement of being “the second largest music subscription service in the world” although to its credit, that sentence came with an “in terms of countries serviced” qualifier. This morning, Rdio lies third in that table behind Deezer (180+ countries) and Spotify (55), but for now it’s not joining those rivals in announcing how many active users and/or paying subscribers it has. Rdio did give a couple of stats on its global growth though: at the start of this year, 30% of its monthly active users were outside the US, but that has since grown to 57% as it has launched in more territories. All good? Maybe, but without figures we can’t tell if this is all about big growth overseas, or whether there may be an element of churn in the US where the competition has grown ever more intense.