I am fairly certain that funding was not provided through a TIF. In order to recieve TIF monies the city has to set up a TIF district. The city, if I recall correctly, only has three, and they are all in the downtown area. A tax increment financing fund cannot be created for one retailer, rather it must be available to an entire area. If Cabela's did receive incentives it would most most likely be in the form of tax breaks. In tax increment financing a developer is given a sum of money from the bond that is associated with the district. Something that could not have happened because Cabela's is not in a TIF district. So no, that is not what was provided.
Linked is the city TIF district map.
http://www.greenvillesc.gov/omb/forms/budget07/MAP%20-%20TIFDistricts.pdf