Original sentence: GHA uses a shared technology platform for its member brands, and operates a multi-brand loyalty programme, DISCOVERY, which has over 11 million members, as of 2021
Edited sentence: Discovery Dollars can be used to exchange for bespoke local experiences as well as benefits such as room upgrades.GHA Discovery is the loyalty program used by the brands of Global Hotel Alliance.GHA uses a shared technology platform for its member brands, and operates a multi-brand loyalty programme, GHA DISCOVERY, which has over 11 million members, as of 2021.Previously known as "Discovery" it was re-branded and launched in December 2021, introducing the new rewards currency "Discovery Dollars" or "D$".The previous top-tier of "Black" was renamed to "Platinum" as part of the changes under the new GHA Dicovery.Under the previous Discovery program, local experiences were complimentary, attained as a benefit of higher tier levels