Humble Bundle (or anyone really) accusing Steam of monopolistic tactics for gaining market share has literally no idea why gamers like Steam at all. We don't want multiple marketplaces where publishers are charged less for the same game even though we pay the same price, we want a single marketplace where we can access our entire library with ease, where we can connect and play with friends, where we can leave reviews and submit mods. That's what Steam is, and it was us the gamers / customers that made it so big and popular, not their monopolistic business tactics. But since it's a "monopoly" then of course they have to sue, how else would they be able to forcibly control the pc marketplace / platform that the people chose?