[hobofan]

> If you read the Autodesk EULA, I think it prohibits use of any open-source software in these add-ins.

That would have surprised me, as most add-ins I am using are open source and the most popular Fusion apps state that they are open source in their store listings and shouldn't have passed reviews if that were the case.

I took a look at the publisher agreement and it does have this section:

> no Open Source Software is or will be included, incorporated or embedded in, linked to, combined, distributed, or made available with or used in the delivery or provision of Your App in a manner that could cause any Autodesk Assets to be subject to any Open Source License.

There is also a definitions section about this that specifically goes into detail about copyleft licenses, so it seems like they just want to stay very clear of the issue of "copyleft poisoning" and exotic licenses, and ensure that if there is any breach of software license terms that liability is on the add-in author.