I remember Kiss Evansville in '99, and it was more of a hot AC than a CHR. My guess is that changed after Cumulus sold it to Clear Channel. Cumulus got it from Connoisseur in late '99, I believe, and they sold Evansville and several other markets to Clear Channel after the stock scandal hit the next year.
STO was always one of those stations you could look at and never understand why it was doing so well. Brill Media definitely subscribed to the philosophy that you were never sold out if you were playing music. I can remember hearing only two songs back-to-back between stopsets. A couple years later, I found myself working for an upstart CHR competing against an ex-Brill station in another market, and we were able to clean their clock in two books largely because they hadn't recovered from their reputation as being spot heavy during the Brill years. I found myself doing time at the dismantled heritage CHR about three years later, and people were still cussing Brill's programming philosophy. I suspect Kiss also took advantage of STO's reputation, though I doubt any Clear Channel station played 20-in-a-row like we did!