You misunderstood that post. He already paid for win7 and he needed to pay 129 more to upgrade professional to ultimate. He's not complaining about paying for windows but rather paying an exorbitant amount for what he considers basic needs.
I believe the other big issue (so far not addressed) is the confusing tier of OS's:
Win7 Home Premium (if this is the baseline product, why call it "Premium"?
Win7 Professional
Win7 Ultimate
Win7 OEM/System Builder's
...plus maybe one or two more I am leaving out. Oh, and you can specify 32- or 64-bit for each.
That is confusing...I'm not surprised people don't know what the differences are. Remember how Vista fell flat, with all the different tiers?
Apple sells the OS the right way--one price gets you all the features (and now the price is $19.99). If you want the Server OS, one price gets you all those features as well.