Epic takes 30% to cover the costs of the 50th time you download the asset, the moderation process for the Marketplace, the updates to the individual projects, prompting Asset Creators to update the assets and listings to improve the quality of the overall store, and the transaction fees associated with selling a product almost completely worldwide. And that is just the things I know of, and I am sure I am missing things like the advertising costs, and the cost of reviewing for the new Staff Pics.
Do you now expect Epic just to eat those costs, just to have your way? That seems rather unreasonable. If they decide to eat those costs for their own benefit, that is their decision as a business, but they won’t do it out of the kindness in their heart. Epic is a profit driven company, and even if they weren’t profit driven, they must still pay the bills and the people whom work for them, like the Community Managers that are literally catering to the needs of the community.