Until 2 days ago, you could get a free night at an IHG hotel if you could find a better price on Expedia, Trivago, etc., than IHG.com. Sadly, that part of their Best Price Guarantee has quietly ended.
As reported on Loyalty Lobby,and Frequent Miler , the hotel group now offers to match the lower price you found and give you 5x bonus IHG points (worth roughly 3%).
I once did a price match to an IHG property in Hong Kong and got a free room, which was pretty sweet. With this new devaluation, that will no longer be possible.