Update: It turns out that it has always been possible to link a Marketplace asset to another EULA; I had never noticed this before!
YoYoGames apparently has added Creative Commons licensing to their standard EULA for purchases made through their Marketplace with the Creative Commons Attribution-ShareAlike 2.0 Generic license.
The old GameMaker Marketplace EULA is still in use for some assets:
Assets sold under the Creative Commons license show a different EULA:
Oddly, though, YYG have set up the checkout so that people purchasing assets for GameMaker Studio can make a donation to Creative Commons during checkout. At first, I thought that this was a donation to the asset maker, which would effectively allow a “pay what you want” model for free assets. But after clicking the Donate Now button, it became evident that it was for donating to Creative Commons, the organization that created the Creative Commons licensing. While I’m glad to see the Creative Commons organization getting support this way, it’s a bit confusing at first to someone who just wants to pay for their marketplace purchase.
Creative Commons licensing is a great idea and is exactly the right fit for the purpose here. I’m thrilled to see YoYoGames using CC licensing as another option in addition of their own license.