Independent hotels weighing corporate distribution face a choice between fee-based TMC programs with real volume and commission-only consortia; Amex GBT’s new Preferred Extras Lite tier now opens a lower-cost entry point at the top.Independent hotels weighing corporate distribution face a choice between fee-based TMC programs with real volume and commission-only consortia; Amex GBT’s new Preferred Extras Lite tier now opens a lower-cost entry point at the top.