AMS: not a good example, its not worth £2 ($4). Well actually it is a good example, because Microsoft will sell a (admittedly cut down) version of their OS to third world countries $3. This is at a massive loss, but they consider it money well spent to ensure that developing nations develop a Windows crack dependency (which will cost them dear later on), and are prevented from experiencing alternative open source OSs which might fuel the local software industry.
Microsoft are able to take this loss due to the massive revenues from monopoly racketeering which they have been convicted of around the world, but have suffered no effective punishment. Unfortunately no company which has ever traded honestly, including RISC OS ones, has been able to generate the revenues necessary for such a loss leading subsidy on hardware or software.