I've been noticing a LOT of Amplitude games sales, for about a year now. Seems no one's buying so now they're just giving the first away and hoping that helps. Btw, I bought the first already, that's why I'm not buying any more.
I like Ampiltude games, actually, i owned Endless Legend, Endless Space 1 & 2, and Dungeon of the Endless, now hyped for their newest game Humankind