Hi Gedden,
I would just like to clarify that you are able to discuss your licensing terms with EPIC. Here is the official stance on the FAQ:
I am close to shipping or have shipped projects using UDK. What does this mean for me?
Your terms haven’t changed, however we’re giving you the option to choose your royalty terms. Pick whichever is more favorable to you and apply either the new UE4 royalty model (5% of gross revenue) or your existing UDK terms (25% of net revenue after you take home $50,000) to all UDK product revenue from January 1, 2014 onward.
Again, check the UDK forums as we’re posting info there as well.
Email us at udk-licensing@epicgames.com if you have any questions.
Further, you have the option to create a custom license, as stated here:
Thank you for your post,