What exactly does the "Regional Sports Fee" cover?

I'm in the Chicago area and I'm currently paying $19.20 a month for the "Regional Sports Fee".

Currently we cannot watch the Blackhawks, Bulls, or White Sox on Xfinity because CHSN isn't available.

The Cubs are on Marquee and I think it's in the $9.99 More Sports & Ent Pkg?

The Bears are on broadcast TV so I would think that should be included in the $25.65 Broadcast TV Fee.

What exactly does this cover?