Microsoft has confirmed their Xbox Live developer fees are a thing of the past.
Corporate Vice President for Xbox Marc Whitten took to twitter to reveal the change in policy, which, according to Whitten, has been in effect since April:
@Polygon: FYI Microsoft eliminated fees for Title Updates on Xbox 360 Arcade games in April 2013
— Marc Whitten (@notwen) June 27, 2013
Previously, updates would set respective developers back tens of thousands, so the news is being heralded as a welcome change.