The ducks thing is literally nothing.
Its just a way to measure your e-peen.
Buy this and you can compare your e-peen with your friends. If its too small, buy some viagra tokens and increase it on the spot! Getting your e-peen bigger means its easier to make it even bigger! But not that easier, we still want you to give us your money.
And I dont have faith on the Spy/Engineer thing. Knowing how things go, we gonna have 100 hats, Demoknight stuff, another Rocket Launcher and at least 3 melee reskins for everyone but Spy and Engineer.