Just the last fews days, four legs, #1 on the upgrade list for each leg with about 400k rolling.

DFW-MIA, 2 seats of 20 available from 24 hours out, upgraded 5 minutes before boarding, was offered paid upgrade till then.
MIA-SXM, 0 seats of 16 available from a week+ out, no upgrade, never offered a paid upgrade.
SXM-CLT, 2 seats of 20 available at 24 hours out, but sold by 2 hours out, no upgrade, never offered a paid upgrade.
CLT-DFW, 6 seats of 20 available at 24 hours out, upgrade cleared at 24 hours out, was offered paid upgrade until it cleared.