The presence of similar business ventures is a huge factor in determining the terms of a lease. Withholding that sort of information would be a huge bad faith move that would have teams of lawyers swarming for the chance to go after Disney.
Ridemakerz hardly counts as a true third party operator. Build-A-Bear Workshop is an investor in the company, but not its sole owner.
They have three stores outside of the two Downtown Disney districts. The other way they are spreading across the country is through the new Disney Store format. Then today Screamscape reports that Sarge’s Surplus in Cars Land may be another Disney-connected Ridemakerz store. Ridemakerz is very much tied to Disney and "second party operator" is probably a better descriptor.