Have you looked at some of the crap for sale on Market? I'm no fashionista, but the majority of the jewelry that I see posted by Market vendors is something a 2nd grader made in art class. "That's really lovely, honey."
And the various pills and potions to make you look younger or feel more "vital." That's a crowded space.
Assuming that Verb is charging little or no on-boarding fees and no monthly fees, what does a seller have to lose by signing up and doing a couple of videos?
Despite what Rory and his sales team would suggest, the number of sign-ups is meaningless. And while it's true that there are some "big names" on Market (The Container Store, Target, Best Buy) none of them have done videos on Market.