It is because USAG sponsors this meet.
Essentially it is the old NCAA Division 2 that was discontinued by NCAA as it merged D1, D2, D3 into one nationals instead of separate ones.
Division 3 nationals were also discontinued by the NCAA.
Which is now run by the NCGA (National Collegiate Gymnastics Association).
USAG started this meet for D2 schools, D3 schools that are not in the NGCA, and any D1 schools that offer less than 7.5 scholarships.
Eligible Schools:
D1: Lindenwood, Cornell, Brown, Air Force
D2: SCSU, Bridgeport, Texas Woman's, Fisk, Talladega, West Chester
D3: Centenary
NCGA and USAG hold these meets to recognize the D2/D3 athletes (plus small D1 schools) since they are unlikely to make regionals, let alone nationals. Though both Bridgeport and Lindenwood made regionals in previous years.