Actually, from a business perspective of managing a valuable brand it doesn't make sense. Once you get fatties being seen buying/wearing your brand that causes brand devaluation. And that is worth far more than the meager profit (if any) on plus sized garments. Ideally, you want to be perceived as "exclusive" as possible right up until the point the losers and hams are absolutely salivating to be able to afford and fit into your products. Then you can sell the brand to the highest bidder, walk away with a dump truck full of cash, and let the hammies buy their cheap "branded" knock-offs until the brand is worthless - you don't care as you've made your money. Rinse, repeat. How many times do we see this exact model executed?