1) Remember, Disney does not pay for Epcot lands, countries do.
2) OK, actually companies and tourist bureaus pay for the exhibit (Morocco is the ONLY country-sponsored pavilion).
3) So, WDW needs to find sources of new sponsors for payment.
4) In fact, when a company pulls out of sponsorship, the exhibit-ride-etc really suffers in quality.
. . . Examples: . . . Spaceship Earth . . . Innovations . . . The Land . . . Imagination
NOTE: During the late 1990's and early 2000's several companies pulled out of sponsorship. Advertising AT the parks through sponsorship does not carry the same cache as it once did.