WIY: YWN already does that, they have Divrei Torah articles every Friday.
Wisey: that empty space that you see is actually sometimes sold as advertising space for a lot of money. YWN cost money to run, they are a business not a chesed organization. Advertising space is worth a lot of money to them and they sell it when they can. Giving away ad space would destroy the whole business, why would a tzedaka pay money for ads if they can get it for free?