> Create a single or multi-user business account, approve orders
I've been in a lot of companies where they want to offload buying (e.g. office supplies, computer equipment) but don't have a dedicated department to oversee it, and don't really want to be handing out the company credit card to every employee who might need it.
Amazon's new product has two benefits: You don't have to give other employees the company credit card (presumably) and the orders come back to management for final approval. It is like having your own buying department in terms of friction (as a lot of buying departments seek final approval from management anyway).
This mostly applies to small purchases. Big purchases (e.g. servers, furniture, etc) will likely remain invoiced by the normal means even if just for cashflow. But business I've worked in spend a lot more than you'd think on Amazon just buying "day to day" bits and pieces (that are often cheaper than Staples, or similar local places).