Yeah i couldn't find details on that. http://code.google.com/p/opentyrian/wiki/FAQ And from the README:
4. Prohibited Uses. UNDER NO CIRCUMSTANCES SHALL YOU ENGAGE IN, OR KNOWINGLY PERMIT OTHERS TO ENGAGE IN, ANY OF THE FOLLOWING WITH RESPECT TO THE GAME AND RELATED MATERIALS: a. Renting the Game or related materials; b. Selling the Game or related materials; c. Leasing the Game or related materials; d. Offering the Game on a pay-per-play or similar basis; e. Distributing the Game for money or other consideration; f. Copying the Game or any portion thereof except as permitted above with respect to a single backup copy; or g. In any manner and through any medium whatsoever commercially exploit the Game or use the Game for any commercial purpose.