Credit clarification: the WU phones home once an hour and reports what it has done. Right now a 2G core/thread makes around 300 credits/hour and a 3.4G thread is producing about 500 credits/hr. So you could lose that amount of credit if you shut down right before it wants to call in. When the project goes from Beta to Production the credits will be reduced to hit the goal of 175/hr for a 2G thread and 300/hr for a 3.4G thread. That will be about a 40% reduction from the current levels. Even so, it pays quite well