CHARLOTTE, North Carolina, Aug. 5 -- Duke Energy issued the following news release: * * * Duke Energy increases financial incentives for customer energy efficiency and demand response programs in South Carolina * Growing menu of options offers customers more savings and better control over how they use their energy * Some incentives have doubled or even tripled * GREENVILLE, S.C. - Duke Energy has increased incentives and eligibility for many of its residential and business energy efficien  more