Okay, I'll bite: what is the core of their value-proposition? A cultural aesthetic? Cheap rent?
Since it's very easy to set up a competitor (at least in my area, since numerous knockoffs have been created in the last few years) their margins are low at best, and they have almost no customer lock-in, I have no idea what their value proposition is for investors.
A few days ago I moved into a WeWork clone called JustCo. The spaces are much larger, look virtually identical and are in a neighbouring building. Price difference per month was $2300 vs $1600 + a month free. WeWork's best offer was 5% off if we signed for 12 months. No free beer here, but I've got a beer budget of $700 a month with the savings.
It seems WeWork's sales guys here in Sydney have very little freedom to discount.