The tax doesnt get them anything, they get money the second you load your money onto your steamwallet, for Valve themselves skins have no monetary value at all, and they also say that. The monetary value comes from people willing to buy skins with real money instead of steam wallet money and is NOT intended by Valve if you would actually look through their tradingpolicies. The "tax" is only there so you have to actually refill your steam wallet again to buy equally valued skins and to promote trading instead of buying/selling, like how does it matter for Valve if they take a share of the money they already own? Because that exactly what the tax on the steam market is. And it seems like you have no idea how these gambling sites work, none of them bought skins or ever opened crates, first it started with a potformat where people would just put in their skins and whoever wins gets the whole pot, the stock from those sites come from the people who actually bet on those sites. Valve doesnt get shit from that whole thing, they only get money when people put money on their steamwallet.