I reckon some brands might just have said that they were no longer willing to sell themselves for pennies. I've noticed that Clarins is never (or rarely) included in BAC's for example.
It also goes to show that the likes of PK must have huge mark ups. I guess if we like that brand, then it may sway us, but my llist of DoD's is getting longer as the years go by.
E.G. CT is everywhere. Freebies in magazines, and in all the BAC's. Eventually, nobody will buy and the brand will die a death (it's overpriced and associated with teens now anyway)
Lancome, Chanel, Dior, Clinique and Clarins (as previously mentioned) along with the likes of Origins and other mid to high range 'big names' will likely survive and always have their loyal core customer base.
It also cheapens fragrances like Thameen to me as that's everywhere, too.