Amusement ride licensing

EULA Section 5-9 read: Revenue from interactive amusement park rides which use the Licensed Technology.

The way I interpret this is that the revenue from the operation of the ride is royalty free, What about the selling of the amusement ride to multiples operators?

If there is royalties to be paid, does it applies to the whole selling price knowing that the Unreal component is a very small fraction of the whole system?

All revenue from amusement park rides is royalty free - including revenue at the park or revenue from selling to a park. This answer assumes that the rides are not made for in-home consumption.