With the last of the cable companies that once provided analog channels now going all-digital, providing or renting boxes is the easiest way for a CG to provide a cable TV connection. Most modern digital TVs have digital cable tuners (except maybe the cheapest ones) but not necessarily all the different digital technologies a cable company might use. Then, the cable provider might be scrambling, so that a box with the proper codes is needed, although sometimes a cable card will work for TVs that accept the cable card. But a box is easier for the park to keep track of, and gets around the extra work of installing the cable card in someone's TV and getting the cable company's server to recognize and activate the card/TV combination. All the boxes will have already been IDed.