It seems a bit disingenuous to call this a regressive tax. Higher volume sales lead to lower unit costs. That's quite standard in business, as is bigger players negotiating better deals. Also, small and indie developers would not sell nearly as much as they do without a platform like Steam. And it's not like anyone forces them to publish on Steam. I don't know. I understand their sentiments. Maybe they can form a big group and launch their own publishing platform--or at least threaten it convincingly enough to get Valve to sweeten the pot.