FYI we spend more than 100k/mo because we're a reseller. This means we transact a lot of dollars, but it's not really "spend". Not saying you should optimize for edge cases like us, but giving you an explanation of a failure mode.
Chairman: WHAT THE #$%$ happened to our gross margins?
CEO: Let me tell you how we saved $600 on our new accounting platform...
We ran into this at inDinero.