Comment by jmull

Normally (well, if you're ethical) credit is given.

Also, there are IP limits of various sorts (e.g. copyright, trademark) for various purposes (some arguably good, some arguably bad), and some freedoms (e.g., fair use). There's no issue if this follows the rules... but I don't see where that's implemented here.

It looks like they may be selling IP they don't own the right to.