Hi mate The 27.5w feed has been in the clear since last october. Obviously it could go off at any time, but 7 months is quite a long time, so long may it stay! I dont think it is otherwise possible to watch nba tv. The feed is there for the likes of NASN, only for periodic viewing, and not general viewing on any sub. The only one I can think of is NBA+, broadcast by Canal Satellite France, however, it is completely in french.
Just get the benefits of the feed whilst its there, and pray it stays longer!