For a while, WYRD-FM was also on 105.9 in Greenville. The signal wasn't needed. I think it was a place holder for the translator owner. Now, the station is airing the HD2 of 93.3, which is a religious station actually based in Anderson (I believe).
It's a smart move to go on a bunch of translators. Kent is absolutely right, "you work with what you have."
I'm sure many people listen on their smart phones or some kind of stream, too, like on Google Home or Alexa. To blow up one of their big stations like 101.1, 98.9 or 93.7 for "WORD" would be crazy. It's making money for Entercom and that's what matters. This is the same logic being used in NYC and Philly with WCBS-AM, 1010WINS and KYW. They have no FM signal, other than an HD2 or 3, and they continue to bring in money. Not going to blow up anything, especially a music station, which might not be pulling in as much money, but doesn't cost much to operate either.