Their website seems pretty clear on this, so regardless of what the unit is actually capable of towing, the weight limit is 2,500 lbs and you're signing a document that asserts that you won't tow more than that.
That weight limit is so low that it seems that they only want people to tow a lightweight boat or ORV or something like that, and don't want to allow car towing.
We do allow towing with all sizes of our motorhomes. Towing is not allowed with Truck Campers. The motorhomes are only equipped with a receiver hitch, so you would need to provide your own tow bar. No towing apparatus or hook-up services are provided under any circumstances. Customer must declare intention to tow prior to departure and warrant that towing weight is within 2,500 lb. tow weight restrictions. A $25 per night towing charge will be imposed. Cruise America provides no collision or liability coverage for damage to the towed object or for third- party injury inflicted by the towed object, under any circumstances.