UPDATE, as this is the only thread that I can find with a history of Class Up bids -
Flying SEA-KEF-CDG tomorrow. Purchased economy lite ticket at $399 round trip (who goes to Iceland in January!) There were about 12 seats empty in SAGA. Bid just over minimum (upper edge of red) and bid was accepted 72 hours out.
For us, it's worth it because as Alaska frequent flyers, we get NO miles for flying economy lite. So along with a more comfy seat and lounge access, we'll also get 125% miles. Total cost for a SAGA class ticket from SEA-KEF-CDG was about $700 o/w, gaining 11,291 miles each way flown SAGA but zero if flown economy lite.