I think the part referring to Poser 8 is incorrectly worded - it says "Buy to Poser 8 for only $99.99" but probably should say "Upgrade to Poser 8 for only $99.99" as the other page explains. The "buy" price is $199.99

The Poser Pro part also refers to the upgrade price which is $199.99 or $250 for the current reduced buy price.

If you only buy Poser 8 then you don't get a free upgrade to Poser Pro 2010, you still need the upgrade/sidegrade on top.