With the size of the current SG leaderboard.. Adding this would probably be a pain. I personally never really look at the SG leaderboard. I also have to agree with @block_crusher on this one.
You may not look but I know countless users that do. This is only 1-2 tabs you need to add under the users name when you click on it. Not that much.
Uh... How is it 'not that much' the database will need to be changed to suit this. Then the database actually must understand what we want. Now if you can code in PHP, and its 'not much' how would we do it?
I can't code in PHP and if it is apparently not "not that much" and you CAN code PHP, then I must be mistaken. But my original theory was it was just added as a couple words to look for in-game and it is just another tab with another couple names and numbers to add.
I can code php, but not to too much about interacting with databases. Even although it seems like a little, with the size of the current database it probably takes a lot of work.
Okay well, I was wrong... But I still think this should be added, even if it is added with little work done to it