It does take time, but when you launch a product that's missing basic features (like a shopping cart, something almost every online store in existence has) you tell on yourself to your customers, and let them know they're not a priority.

I don't disagree that Steam's feature rich platform makes it hard to compete with on that level... but for fuck's sake, at least try a little bit. Especially if your first move is to say they're unfairly gaming the market by... providing something people want.

Yeah, it will. But start with the most important features while also building some of those features that solve problems.