A public company can't exactly openly shitlord. They have to be more subtle, like Lululemon only offering sizes up to 12. While they do "offer" that high, if you visit the stores, the 10's and 12's are thrown haphazardly under the counters and they don't ever stock more than a couple of them in a given style anyhow. Pretty brilliant company, really. Not offering "plus size" anything is a great way to protect your brand identity.