Last week, SFO-IST at SFO TK business/elite check in counters:
Sign offering 1299$ paid upgrade Y -> C on 777 new J (49 seats, 7 rows, 2-3-2 configuration). Seems like an OK deal to me for what is their longest route with some great service in J.
Already had J confirmed so didn't need it but would have paid if not. At the end, J was only at 40% capacity (no idea if Y was full). Seems like they didn't upgrade a lot of people, status or paid.