Because demand might be elastic and you can keep costs closer to utilization and outsource stuff you don't want to do like manage an office
Same reason companies pay Google and Amazon for cloud servers
Same reason companies pay Google and Amazon for cloud servers
Cynically, those companies have the downside of needing to make a profit. WeWork strikes me as the sort of company that would happily take a massive loss, just to get to brag that Stripe and Facebook use their services.
That strategy works great, so long as you have unlimited funding.