Our company has various Mac computers that need to purchase software from the Mac App Store. This includes Apple software like Keynote or the Lion update, but also apps from third-party developers.
Currently we have one Apple id linked to the company credit card which we use to make purchases. However, we're only charged once per app (good for us; bad for the developer) and we suspect there might be a device limit.
What is the recommended or right way of purchasing from the App Store at work?