If they do, it doesn't sound that way in my part of South King County. 99.3 sounds like a fringe station from my location SE of Seattle.
99.3 still sounds like CFOX up here. It's a shame they geo-blocked south of the border. Oh well. That's what VPNs and proxies are for.
It's pretty much open season on the Seattle frequencies up here. Hispanic Religion is on 94.1. KZAX-LP is 94.9, KMRE-LP is 102.3, KGMI is on 96.5, KBAI on 98.9 and KPUG on 97.9 (so there goes KING-FM. But it wasn't like you could get it up here since they went to Tiger Mountain anyway.)
The crosstalk on the other side makes CBUF 97.7 sound like a quiet little French bistro with a quiet little French DJ playing quiet little French show tunes separated by a razor thin wall next to a noisy American sports bar filled with loudmouth sports freaks.