RadonGOG: Edit:
Some folks mentioned a prize!
What is the prize, BTW?
Maighstir: As mentioned in the OP, 18 games from an Interplay partial-pay-what-you-want promo in three tiers (first tier PWYW, second and first tier above a certain value, and all three if you paid above another value). Those 18 are more than half the games from the promo, yet the price I paid was a lot less than the games I didn't already have would otherwise cost.
So, I effectively got a dozen or so games at a very good price, then a code for another 18 for free (that I already had) because I bought those dozen.
Here:
http://www.gog.com/forum/general/special_promo_pay_what_you_want_for_interplay_games The promo page is long gone, but the news post is still there. I already had 18 of the games, so those are what's offered.
The interplay promo had been a nice one I really loved!
But, due to this, I already got all of the games:
So I´d only be in if " If you already own some of them you can redeem the rest and send what's left to a friend. "
also applies to "using it as a price for a GOG-riddle".