I am not a lawyer, but as far as I know that’s actually incorrect, selling a product below cost is considered predatory dumping, as it means literally nobody can afford to compete with you on anything resembling a level playing field. How is any competitor supposed to release a competing product when Gabe is using his own financial resources for “eating the price spikes”. Unless you have your own financial resources or massive speculative investment, you cannot also “eat the price spikes” so your own products will have to be priced at realistic levels so that it is something that actually earns you some level of profit in order for your business to continue and grow, and thus those products will be far more expensive than Valve’s subsidized product, and thus, you probably won’t sell any unless you have some significant further advantage, which you shouldn’t need to have in order to simply compete with the market leader. That’s a clear barrier to entry, and is the definition of anti-competitive.

Usually, this would be done to lock the subsidized buyers into a particular ecosystem, or even just to bundle that ecosystem by default (aka illegal bundling, like Microsoft did for years) from which additional profit can later be expected. In Valve’s case, this would be Steam, and it pretty clearly would profit them in the long run, and this strategy also keeping all competitors out by dumping hardware below cost, thus abusing their Steam distribution monopoly to fund a second monopoly on the Steam Machines market to maintain their first monopoly. That’s literally what antitrust laws were designed for. Just because we don’t really effectively enforce them anymore I feel like people have started losing sight of what they mean and what they are supposed to be for and I don’t think we should just normalize that this is how businesses are supposed to operate.

And that’s why Valve probably won’t do that. (at least I suspect they won’t, based on my view of their history, I have no insider knowledge)