I believe the $2999 price is for licensing Zwibbler so you can have it on your own site/app. For example if you had a company that made custom t-shirts, users could create their own designs using Zwibbler on your site.
On the other hand, if you just want to draw some pictures using the Zwibbler demo to put them on your blog, you don't need a license, and it doesn't cost you anything.
On the other hand, if you just want to draw some pictures using the Zwibbler demo to put them on your blog, you don't need a license, and it doesn't cost you anything.