If it's still getting played that much, then it should still be in the charts. People can't complain about ACR applied to Christmas songs in one day, and then say "kick out Mr. Brightside forever!" the next.

 

It's currently #254 on iTunes, so people are still buying it, too. It usually gets into the top 75 around New Year, too, as it's on a lot of people's playlists around that time!

 

^that's just the 1 sale, if it's charting all these months is thanks to streaming, it's a modern streaming classic, perpetually in the top 200 on Spotify

The song does help to keep sales of direct hits ticking over aswell it's been a real consistent seller now and stayed on the charts for ages now which has really helped build up its sales.