Comment by skwashd

> This seems more like having several random contractors who you've never met coming into your business in the middle of night. [...] Agencies that routinely swap workers into or out of various roles at your company without asking or telling you, so you don't have any idea who the person working in the office is, what they're doing, or even if they're supposed to be there.

Sounds very similar to how global SIs staff enterprise IT contracts.