That's annoying. At Mr. Rebates the rate recently dropped to 5%, after having almost always been 8% in recent months, but taking LCAH benefits doesn't invalidate the rebate. (Note that the rebate is only 2% for Fairmont, Raffles and Swissôtel, though.)
For Accor reservations i’m using Avios Shop since 2 months, since the cash back at MrRebates have dropped down ... i’m Afraid, because Never had a problem with them
Avios Shop pay currently 8 Avios x pound.