They didn't use to go that small in their sizes. Maybe it is because their tights - they started up only selling tights - are so bloomin' brilliant (they seem to stretch in all directions!), people with smaller clothes sizes asked them to do them in their sizes as well, and they have got so popular now, that they apparently stock them in even smaller sizes? If any of their products don't sell well enough, they stop selling them.
I don't believe that anyone actually likes being morbidly obese, and I can assure you that their extremely obese models do not make any of us fatties, however fat we may be, look at those extremely obese ladies and think "oh, I wish I was that big!" Or "Wow, she looks stunning!". What I, (and I expect many of us obese women) feel when we see those photos, is firstly, empathy, and secondly, a determination to not let ourselves get that big!
My hope for the models modelling the extreme sizes, is that they don't read articles, or threads like this one, and then suddenly realise that they are not on the safe website that they thought they were. The snug website may be the only place where they feel that they can be properly themselves, and they may even allow themselves to show their playful, and sexy - but sadly mainly buried - innermost feelings. I wouldn't be at all surprised if the very largest of the models, and the very largest of snags customers, hardly ever go out in real life due to being ridiculed, and much worse than 'just' being ridiculed:
eg "Oi you, what are you, are you some sort of mutated animal?", or "For fucks sake, what are you doing out, shouldn't you be kept in a cage at the circus, or maybe in the whale enclosure at the zoo?" or "I hope you're on the way to the abattoir, as that's all you are fit for" or "God! What sort of monster are you, please go and fucking kill yourself, no-one wants to have to look at you!"
If you think those sort of comments are very rare, please believe me when I tell you they are very sadly not. They are enough to make some overweight people contemplate committing suicide. So @skinnyphobianamechange if you, or anyone else, thinks that seeing very fat women on a website that was originally made to cater to obese women, will make anyone else want to be that size, then I don't know what reality you live in, as it isn't the one most of us reside in.