... because it seems a certain site is infriging on a number of distribution licenses you acquired.
By my logic, if they had properly acquired the licenses before you did, you'd be unable to do so yourselves.
Judging from its Terms page (http://www.classicgamingpresents.com/Terms.htm) and several games which they logically should NOT be able to sell as digital downloads, eg Spore, it's very much possible they are operating illegally.
Just so you know I'm not kidding you, here's a list of titles currently sold on your site that they are apparently also "selling":
{snip: removed per advice from other users}

Uh, what makes you think that GOG has exclusive rights to sell any of the games in the library? Most of them are also available from Steam, GameTap, Direct2Drive and other digital services already. GOG is basically just a store front in this respect . You wouldn't see Target suing WalMart for selling the same games, would you?
EDIT - Though after looking into that site a little more, I question the legality of the site in general. According to their own info page, they don't sell games, they sell an installer that "patches various old classic games to make them work on newer versions of Windows" and they give away the games with the installer for free, because they are abandonware games. That sounds more than a little sketchy to me.

I recommend taking those links down and sending them specifically to support@gog.com because those links contains the malware. x.x

Anyone can create a legal website to sell games and I am sure that all because GOG is selling them that other webites will also be doing the same.
Not wise to go around accusing people otherwise it'll end up as you having legal action taked against.

Well, if you go to just the main site
"classicgamingpresents" it's got a nice little logo with mario and luigi.
I somehow doubt they are licensed by Nintendo. :)

All the games I click on that page just link to their respective original digital download stores. Spore just points me to EA's store and S.T.A.L.K.E.R. points me to Direct2Drive. Someone is just looking for traffic.

Yeah, horseman, please edit your post to remove those sketchy links. Send your concerns directly to gog.com. How do you know those links don't carry malware payloads? Preliminary googling suggests the site is an ad farm.
In fact, the OCD paranoid guy in me is already feeling dirty and unclean for even going to the landing page.
Are you sure, Weclock? What makes you say that?

my computer got the malware after visiting.

Oh dear. What scanner warned you, what was the culprit called, and are you using Firefox with NoScript?
PS - if you don't mind my asking. Sorry if that sounded blunt.

called the browser crash.
Don't lecture me on tech support either, I was using my work computer, where I administer tech support as an ISP.

:(
Weclock, it's my fault you misunderstood me. I visited the site too and in my usual nervous state I was merely asking what you found out. If it was anything I needed to know. I have NoScript enabled and was seeking assurances that all was well and seeing if you have it too.
Again, sorry for the confusion.

The way they direct you to other Direct to Drive services (inside frames) leads me to believe that they are also fishing for credit card information.
Site is illegal, no question about it.

You're right. Done.
Or perhaps door 3: is very busy and thought it would be easier to draw their attention through the forums.
*sigh*
Have you ever heard of something called "licensing agreements"? In order to legally distribute digital copies of a program, you need such an agreement with the copyright owner.
You might enjoy looking the other way. I don't.
On newer titles. Did you see the pages on the older ones, though? MDK, Castles, Jagged Alliance, Battle Chess?
Further, the "product descriptions" on there are invariably stolen from other websites. I know that because I just so happen to be a staff member on one of these.

I couldn't make it past the Purple Page o' Horror because my retinas had failed.
Anyways, I googled the site and AVG said it was safe...not sure how reliable that info was because I didn't bother. Any web site that horribly designed must have something bad going on with it ...

Oh Dear! You DO like the sound of your own voice don't you? *sigh*
Of course, you silly little person, I have heard of licensing agreements and being so flippant about it isn't exactly the way to start a conversation. I CAN start a website just in the same way as GOG have done and other websites, as long as I get several HUNDRED things in place first one of them being a licence agreement.
And who was looking the other way? READ what I wrote, I advised the poster to be careful about who he openly accuses thats all, nothing else. As other posters have said, things like that are better off kept private.
Take your attitude elsewhere, improve your reading skills and get off your pedestal whilst you're there.