I don't think he would have pulled the plug so early if he was making money from it. Probably just a coincidence or someone got spooked by everything going on.
The big stories at the time were that hospitals in the UK were getting shut down by it. If whoever did it lived in the UK they may have had a change of heart.
yeah, the thing about shutting down hospitals is that instead of looking at fraud and computer crimes that probably won't even be investigated you are potentially looking at manslaughter.