"Craft" means the methods and ingredients much more than production size. I consider Boston, Yuengling, Sierra Nevada and New Belgium craft. Micro/nano, not so much. They have fought hard to keep the name craft, and rightfully so with companies like Inbev buying up the industry and cheapening it.
The sale is a bummer, but business. Not surprised really. The market is saturated, and they will not enjoy the highs that they had back when there were far fewer players, so why not cash out at the right time?