Insane valuation
Theres very little barrier to entry. I'm already a member of two of these things and am considering cancelling both as they are very spammy and if you actually take a good hard look at the deals they aren't necessarily that good.
I just don't see it as a sustainably highly profitable in the long term. Its new so getting lots of subscribers and sales but competition will drive the profit margins down to next to nothing (not that they turning a profit yet anyway).