Exactly. If you're selling stolen or pirate product at a cut rate, people will tolerate goofiness for the better deal, but if you're scalping and people are pay

Exactly. If you're selling stolen or pirate product at a cut rate, people will tolerate goofiness for the better deal, but if you're scalping and people are paying above-market, they're not going to take the risk on sketchy purchases that may get their Steam account banned or something. And the scalper isn't going to take the risk buying a ton of product they can't unload, so even Valve stating they will enforce this would have a measurable effect.