First, it should be noted that the Royalties do not go to Disney. All royalties paid go to the composers, the composers estate if they have passed away, and to the artist (only on rare occasions where the contract lists the artist as royalty barring).
Also, radio stations pay the music unions (ASCAP or BMI) a yearly flat fee. This fee is usually much lower for this type of outlet because it is considered atmosphere ? music in the background. This allows them to play anything they want as long as they maintain a record of what was played on what day and how many times. Royalties are not paid on a title by title basis.
This is the reason why I could not include any of the area music from DCA on the DCA OA. Theme parks (area music) are under the same mandate that Radio Stations. A flat fee is paid to the unions. When I approached the idea of using the area music, I found that I would have to get clearance from the artist and/or record lable that holds the rights to these recordings and then pay additional royalties to use them on the album. The main difference between a Radio Station / Theme Park use and my use is that I was creating a product that people would buy and own. We would be getting money for our album so the composers and publishers want their cut - and rightfully so. With Radio, the audio just spills into people homes and no profit comes in from the broadcast of the music. Advertising is the lifeblood of radio.
However, though I can't say for sure, if you subscribe to a pay service for your audio source (like with XM Radio) you may see a slight increase in your subscription fee, but it would more than likely be so minimal that you may not even realize an increase.
Royalty increases are nothing for you to worry about, it only affects those who sell the music.
Hope this clears up some of your concerns.