It's a move to attract business. That's the main reason.
That city and the state as a whole is still conservative majority, I think.
Ask a gay high school kid who live there, (I know one, moved from big cities to live there), he will tell you about the attitude of young males toward homosexuality is just the same with any other southern states, unlike cities like in California or NY (his home state). Lots of "faggot", "ah that's so gay", "stop being such a fag", etc
Many LGBT people move there because it's a cheaper living with jobs available than big cities like NYC or San Francisco. Pretty much big cities in southern states are like that, Charlotte NC, Atlanta GA, Indianapolis, etc.