markee174: "They can make money where they can sell additional value above and beyond the free product."
They meaning Xara?
"Beyond a printed manual, where is the added value on a product like Xara/Artrworks?"
Well, as is noted on the Xara Web site, there are a few proprietary things that they can't release under the GPL. Just like Sun sells StarOffice - a proprietary edition of OpenOffice.org with "unopenable" extras - it's very likely that Xara could sell a similar edition of their software. They can do this because they own all of the code right now and can license it any way they choose.