How am I going to use sports fans to drive 140k monthly traffic to my website?

This is my website with over 20,000 icons in a bundle, that I’ve been working on for over 4 years now - Flat-Icons(dot)com

Some time ago I bought this website, which has 140k UV per month - Teamcolorcodes(dot)com
It shows the color palette of your favorite sports team.

Unfortunately, I didn’t have time to make anything out of it.
I have some ideas, like a sticky bar offering freebie icons, but other than that, not much.

Any ideas?