Selling interactive tools made with unreal

Hi,

I plan to create and sell interactive tools to clients. Such as 3d navigation map for a building, and product configurator etc.

Now if I understand it correctly I do not owe fee to epic from selling such app. However I wonder if that client can distribute this type of app for free on their website for example.

Another example is that the client is a university and they have a touch panel with that app in their lobby that is free to use by people who enter the building.

Are there any fees on distributing the app which the client paid for but distributes for free?

And is the use of megascans also free of charge in such products?

Thanks for any info on this.

I think your clients will need to agree to the unreal EULA themselves first…
but yeah you can sell to them after that