Will I be able to create assets and sell them on the marketplace?

  1. Will I be able to create my own assets and sell them on UE4 Marketplace?
  2. If yes, will Epic charge 5% royalty or any fees?
  3. Will I have to be actively subscribed to be able to utilize when/if such function is implemented.

This is in the Unreal Engine FAQ

Will I be able to build, buy and sell assets on the Marketplace?
Yes, we are building out this functionality. Right now everything on Marketplace is free, and we will release more free content soon.

Eventually all developers will be able to share and sell content through Marketplace. You will be able to distribute your own template games, content examples, plug-ins and more. We’re excited about enabling everyone to make money by releasing assets, tools and code for UE4!