The boost factor provided by the various levels of premium membership is uniform across all rewards and incentives for each Membership Level in accordance with the following table.
No Premium NFT
Level 1 Premium NFT
Level 2 Premium NFT
Level 3 Premium NFT
The page about Fees contains examples of the boost factor influencing how much cashback hosts and guests receive when payments are made using TRVL. The boost factor also influences how much extra protection from the protection pool a host may receive.