I'm not sure the $160 same day turn fare ever existed, from SFO at least. I *did* see a fare for SFO-LAX-ORD-MSN-ORD-LAX-SFO in one day in the $200 range at one point, which would have been about 3.5 cpm (assuming you're already elite and get the 500 mile minimums). But certainly nothing in the $160 range for same day turns.