I was reading a thread on the Steam forums concerning this a moment ago, and someone presented a theory concerning the new soldier... laser... thinger. Basically, as with the Tomislav, Steam releases an OP weapon that everyone wants so that there is a rush to the store to buy it. Then, a few weeks later they release an update that nerfs it to hell. It's so brilliant. THINK OF THE MONEY THAT CAN BE MADE.
This is very true with League of Legends as well.