you only put a cc on hold if you want charging rights while you are a guest in the hotel.
charging rights would include city walk, the parks, and the hotels.
some peeps do not want to carry money with them in the parks or their cc so they request their c.card to be put on hold.
you can opt out of this and decline the offer.
you have posted before that you have a pre paid package.
your cc would not be on any hold as you do not have a balance due when you check out.