While there are probably some rimshot opportunities available, Boost has an in-market signal (the former KFUO-FM) that would make it hard to compete against.Yep 100% now. This is why we recently got K-Love in Columbus, OH which has for years had a very successful Christian CCM station. If EMF could get a signal for the right price in St Louis with the coverage they would want - I would bet you they would happily launch K-Love there.
Trying to use the K-LOVE station finder, it appears that the nearest station is 92.1 KMFC Centralia, MO, whose class C3 signal isn't even going to reach Warren County, much less St. Charles or St. Louis. There appears to be no K-LOVE presence within about 100 miles of St. Louis, whether in Missouri or Illinois. Interesting.