I wanted to know just how icky it is (beyond selling community-made content), in particular, if you could stop paying and not lose all those items you got. And fuck me, they did choose the non-icky option for my question, but the sentence where I found the answer is kind of even worse:

And remember, once redeemed, these limited-edition pieces will stay in your wardrobe, so get them while you can!

So, they’ve solved the technical hurdle to keep the content around forever, but then decided to arbitrarily limit availability to exploit people’s fear of missing out.