It is now being pushed as a single here (just been added to the R1 playlist).

 

I just had a listen to this and it's not really grabbing me on first listen, but it's better than 'On Top Of The World' at least.

I feel like everyone is aware of about half a dozen Imagine Dragons songs by now so they always have really odd chart runs. It's a shame they never pushed "Monster", it's one of my favourites.