Yeah, previous scalper accounts can just be reactivated. Also, what qualifies as purchase? Is adding a F2P game or a demo a purchase in this context?

Now the scalpers sell the controllers to the rich.

I actually like the approach, because it makes it insanely expensive to be a scalper. This leads to fewer scalpers, less inflated demand and probably more people getting their controller sooner.

I really really dislike the business model of scalpers and putting them out of business is good.

I mean, those are the most valuable customers to Valve, so ... yes? Idk. You could go by account age instead if that makes it fairer somehow.