From the site:
Free for a game per year sounds like a pretty huge limitation. Not to mention that you’re required to show a logo. I would personally prefer if the streams were about things that don’t have any potential licensing issues. Either things that are already in UE4 or plugins that are completely free.
Edit: Especially considering the new audio engine under development in UE4, I would much rather have a stream on that. From what I know you can already do most things you can do in FMOD in UE4 already.