We book around 200 rooms per year through Hotels.com rather than using other booking platforms, WHY?? Because their loyalty reward scheme was great, book 10 rooms, get a room free!! So in effect a 10% loyalty reward that can be used for either business or personal booking, happy days!!However their newly introduced One Key Reward system has totally killed this off and now only attracts a 2% loyalty reward, this also applies to any rooms coming up that have been booked prior to the change over to OneKey and were booked in good faith expecting a 10% reward. We have 57 upcoming bookings outstanding that will now only get a 2% loyalty reward, in effect costing us around £500.00 in lost rewards.In effect going through Hotels.com rather than through booking.com is now not worth it. We are also "Genuis" bookers on booking.com so will now be using them a lot more in the future.