Digital distributor TuneCore has announced its latest numbers, revealing that its artists have earned more than $330m since the company launched in 2006. That’s based on more than 4bn downloads and streams, with these figures enabling us to see how the dynamics of its business are changing, with $30m having been paid out in the last four months, since TuneCore passed the $300m mark from more than 3bn streams and downloads. That means the last four months have generated a quarter of TuneCore’s historic unit payments but just 9.1% of its historic payouts. The company also says that artist earnings were up 20% year-on-year in the first nine months of 2013, based on a 135% increase in downloads and streams. We wonder if it might be time to start breaking out streams versus downloads though: the per-unit rates are so different, a cumulative figure like 1bn doesn’t make much sense.