Regarding your comment: "It says you'll be billed month per month on the right hand side under the VIP membership program, but I think it's pretty clear that the page is engineered to be misleading."
I'm sorry: you're talking about the section that explains "How the JustFab VIP Program Works"? Whose 4 bullet points say:
1. Get a boutique the first of the month
2. Browse and Buy
3. Don't like anything, skip
4. If you don't buy or skip by the 5th you'll be charged anyway?
And a default unchecked box that you read and agree?
I think the concept of "engineered to be misleading" might just put the points in say, a small font, or in the terms and conditions behind a link. If someone describes it clearly in bold font in a section explaining how the site works, well, that's a pretty strange way of misleading people.
The misleading part is that (in at least one common usage path), the site sets itself up to look like every other online shopping site. The kind that people expect to use by putting stuff in their "shopping cart" and proceed to "checkout" and pay once.
Think of the people in your life not quite as tech-savvy as yourself, like maybe your next-door neighbour or your mother. Would you expect them not to be misled by this? Sure, I'd hope my mother would be critical enough to notice, but I can easily see it happen otherwise.
Another indication is, I assume that a lot of people who do notice will instead decide to bail out entirely and not buy anything, rather than (like I would do, if I really wanted the item) pay, log in, and cancel the account immediately. Because that's not really an obvious thing to do, given the set expectation of being a regular online shopping store.