It's usually something of a two-way street. In the case of attraction sponsorships, an interested company pays a percentage of the cost of a new attraction or rennovation of an existing attraction. In return, Disney will generally use that company's services as a primary vendor. For example, HP sponsors Mission: Space, and nearly every computer on property is HP. Nestle sponsors The Land, and Nesquick and Nescafe are served in most restaraunts around property.