For a majority of CRJs, those that operate under Fee For Departure agreements with mainline carriers, the BELF is 0. The regional airline gets paid the same either way.

I've had a roundtrip that was empty both ways and called Dispatch to see if we could cancel it, saving fuel expense for mainline and wear and tear for us. After being put on hold for a while the answer came back: We had to go since we got paid for completions.

Crazy industry!