Our team here just recently used Sketch to complete a full responsive redesign of Ford.com for a new global look & feel. I love the tool and pushed for it's use on this project. This created a few angry people within our IT department having to individually manage licenses.

For the love of god, PLEASE offer an Enterprise purchasing solution!!! I fear that once Adobe comes out with their equivalent software, IT will prefer it's use over Sketch for the simple fact that it's easier to maintain licensing for large teams.