The Dallas Morning News revealed it has reached 49,000 paying subscribers, according to Q1 disclosures released this week. That should translate into an estimated $5.8 million in subscription revenues this year, if their subscription numbers don't drop (and even more money if they increase).That's an impressive number of paying digital subscribers for a local paper, especially considering the fact that The Boston Globe has only 18,000 paying digital subscribers (and an estimated $3 million in re...