Guest who participates - Has a new experience (positive for the guest)
Disney - Makes more money (positive for Disney)
Guest who does not participate - Literally nothing happens (neutral)
You will see more of this:
Guest who participates - Has an experience that was previously part of regular admission but now must pay for (negative for the guest)
Disney - Makes more money (positive for Disney)
Guest who does not participate - They can no longer do something they had previously done in regular admission (negative for the guest)