* Macbook power bricks (we were having arguments over them, because people would borrow them from other desks; now we have a stack of them).
* Macbook video dongles (same; note: it's not enough to just have one attached to every monitor, like the article says, because sometimes people need to take them out of the office)
* Whiteboards (everyone has one on their desk now)
* Hard disks (same deal; they're so cheap, we just buy new ones any time there's any storage issue, rather than have people scavenge for space on their existing drives)
* Books (everyone gets infinite free books, and to head off time-wasting discussions about who bought what book so they can borrow it, the policy is, you order the book & it's yours full stop; we have many copies of several key books in our office)
We're probably missing lots and lots of opportunities to trade small amounts of money for substantial amounts of time. What are other people buying? An obvious next example would be "soda", since people trek down to the convenience store to get bottles --- but I feel like stocking soda is also a bit unhealthy.