I am guessing another shopping channel for WYFF, but hope I am wrong.It appears Tenga's new Twist network is supposed premiere tomorrow. WYFF is not listed as an affiliate. Their map doesn't show an affiliate here. So it's still a guessing game as to what WYFF is doing.
As for Twist, you can pull in WCNC in Spartanburg County and parts of Greenville County with a good attic or outside antenna. When I lived in Mauldin I got good signals from WBTV, WCNC, and WJZY. Basically north of Laurens Rd. and some of the suburbs to pull in the Charlotte signals.
But I don't see Twist as my personal preference for programming, although I do like some of the other WCNC subs such as Court TV, Justice, and Quest. Also perhaps Tegna will launch Twist on WLTX in Columbia and WXIA in Atlanta, which may offer some coverage on the other fringes of the GSP market. I think maybe you can start to pull in Columbia down about Fountain Inn or Laurens County towards Clinton.