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.
That's kinda the point of WeWork: flexibility.
Remember this is a company that already has a major international business in one of the most regulation industries. Adding in a few real-estate deals is unlikely to be a major source of friction.
This article (https://www.curbed.com/2019/3/26/18280774/wework-real-estate...) seems to indicate that big corporate clients are quite happy to do exactly what I described. I suspect this probably also has to do with transferring CapEx to OpEx.
Perhaps Stripe, specifically, thinks they have a better bead on this than employing someone like WeWork.
Of course, but I assume that WeWork offered them a better deal.
It's the same as a individuals buy vs. rent scenario for a house. Sure, rent may be cheaper, but there are long term pros just holding the property yourself if you can afford it.
WeWork offers both services. WeWork will just as happily get you a whole building designed and decorated to your exact specs, as they will provide you with 3 desks paid for by the day.