because its a cheaper, symmetrical jib ski. it effectively replaces the invader in category, albeit in a completely different performance level and construction. definitely stiffer than a lot of people think, its still soft, but no where near invader soft. they actually almost feel as stiff as chronics do once they break in.
mastermind is completely new really, its price point so it replaces the invader in that aspect, and its retarded soft, so that too, but its directional and narrow (softer flexing silencer, really) so different as well