Regardless of whether political candidates get free air time they will still be taking donations from special interests groups. Most tv and radio stations rely on advertisements for a large portion of their economy. Politicians run their campaigns like a business so they should be willing to pay for the promotions on tv and radio. These days a lot more camnpaigning is done through other methods like social media and online news. If a candidate has a good campaign and is able to convince people to donate then they should be ready to pay for services like advertisements on tv and radio.