The Street, a subscription website covering Wall Street and the financial sector, generated $13.5 million in revenue in the second quarter of 2013. That’s an 8% increase over Q2 of 2012.But what’s most impressive was its growth in subscription revenue, which increased 23.4% year over year. The Street reported it had 77,711 subscribers at the end of Q2, an increase of 2.5% from the prior year.In addition, The Street’s monthly churn rate is improving, dropping from 3.9% to 3.1%.The Street offers a number of premium subscriptions, with various price points (and nearly all with free trials that require a credit card at sign-up).In other news, Harvard Business Review announced the highest paid circulation ever achieved by the 91-year-old magazine. While most of that is print circulation, the magazine also reported having 14,639 “non-replica” digital subscribers.Estimating digital revenues from that number is difficult since the magazine is available in digital form via the iPad, iPhone, Kindle, Nook and Android platforms, all with varying price points. Diversity has been the single biggest problem is getting accurate metrics of digital content sales. However, HBR’s growth illustrates how B2B publications are likely to survive the transition from print to digital with more aplomb.