Any idea why Costco shut down their mortgage lending services?

[Sam Mathew]

Costco shut down their mortgage lending services earlier this year without warning.  It was conventional lenders providing their best rates but Costo capped their lender fees at $250 per loan, which was incredible.  Similar to Lending Tree but better, guaraneed low $250 lender fee and rates were all lowest for conventional loans.  They had plenty of lenders compeiting also.  I used their services many times but they shut it down now.  Just curious, if anyone knows any information on why they did.