Hi Kaladin,
First, as a disclaimer I am not a lawyer / this is not legal advice.
The disclaimer on AnswerHub (also part of the Subscription EULA, section 8 for Feedback or Submissions sent to Epic) is in place so that we can incorporate feedback/bug fixes/feature requests, etc… back into the engine, without having to acquire individual copyright assignments on a per-person, per-post basis.
You can still use stuff that becomes Feedback / Submissions (the capital phrases defined in the EULA), as mentioned by the EULA:
“However, you may continue to freely use any Feedback that you provide to Epic, and you may continue to use, in any way consistent with the License, any Submission that you make available to Epic.”
Cheers,
Michael Noland