The lady who used to front SBC on Q explained that QVC weren't interested in the range because it has fairly static content. QVC make up ranges bring in revenue from buyers who are hungry for new spiffy-looking collections, like Models Prefer with its novel "components" (ie packaging), and other ranges that launch new season colours regularly. There's less income from customers repurchasing a single staple item, so a Laura Geller TSV will tempt buyers who want to repurchase the Balance and Brighten into parting with 40 quid rather than £28 for the single B&B. The same TSV will tempt others who want the new colour items into buying the same set, justifying the price by adding the B&B to their stock-pile because it'll "come in" at a later date.
I doubt the Liz Earle cosmetic range will get much air-time unless they start churning out new colour ranges 3 or 4 times a year, but it may be added to the LE collections to boost their perceived value.
SBC do large sets for make up for make up artistry students.
