Yes and no. I see GGG and Ultimarc stuff marked up on ebay all the time. It's inevitable.
I used to be a member (I may still be, I wouldn't know) of a coding site where you would bid for projects. I figured it would be a good way to get money, build a portfolio, and get my foot in the door somewhere. Before too long, I kept getting low-balled by some guy who was bidding on several hundred projects at a time. No way a single person could write and debug so much code in such a short time. So I did some investigating and discovered that this guy was also a member on several coding sites and forums (I doubt he could write a simple Hello World). He would bid low on a project, win the contract, then present the project on a different site or forum, often masquerading as a homework project or offering "points" or whatever was appropriate for that site. Once he got the code, he would make minor alterations (for credit), get his money, and move on to the next project. I felt this violated the principle of the site so I emailed the webmaster about it.
You know what he said? The guy was doing a pretty good job sub-contracting and the webmaster wouldn't do a thing. I was devastated. I felt that the whole scenario was... I dunno... unfair I guess. I still held a lot of ideals of how the world worked back then. I left the site and tried to hack it out on my own. I checked back on the site about five years later when I found the link on an old computer. The site is a lot bigger now with a lot more members and that ---uvula--- was still on there underbidding on projects and, presumably, making oodles of cash. While I, who worked ---my bottom--- off those five years studying, applying for, and never getting a single programming position, just had been laid off from a manufacturing position. (I checked on the site, it's still there. Don't know if the guy is. Ironically, the closest three competitors to the website have all been black-listed by Google.)
In the years since, I learned a lot of hard lessons about money and life I wish I learned a lot sooner.
Does it irritate me that someone is doing what you're describing? You bet it does. But there's really very little one can do about it. About the best Arcadeshop can do is watermark his pictures to ensure people visit his website somehow.