For this TDY the city of Myrtle Beach is providing two bedroom/two bathroom condos to Allegiant as part of the "deal" to get Allegiant to fly in there this summer.
The $1/hr per diem doesn't sound good obviously, but your own room and own bath doesn't sound bad at all. Though still inadequate, if the condo has a fully furnished kitchen, you will at least not spend as much in food if you are able to buy some groceries for yourself.