Sounds alot like Six Flags's Flash Pass system to me. Hopefully, they will make these passes digital and make it where you can buy them at any time, including the exact second when you see that your favorite ride has a very long line. Also, will this be for Dollywood, SDC, or all HFE parks?
https://www.screamscape.com/html/dollywood.htm
https://www.screamscape.com/html/dollywood.htm