Work-around
This is essentially true, but is not as limiting as it seems. You need to buy 5 'points' worth of Microsoft software to open a volume license (once you've got a volume agreement you can add one thing at a time).
Microsoft Office counts as one point, so if you were to only buy Office yes - you'd have to buy 5 copies. But there are much cheaper Microsoft programs that also count as one point. The cheapest item from our supplier that counts as a point costs $6 (ID: 66J-05385). I've got two or three small clients that need Microsoft Office on a terminal server for just 2 people, so I buy two copies of Office and 3 copies of the $6 item and open a volume agreement.