Also got a ridiculous offer for an LMU from YUL-CDG on a 70% full Y class and 80% full J class. They offered 1399,99$ @ 24/h before departure. Dropped it down to 999,99$ at 1/h before departure. J class ended filling up on e-upgrades I guess, I made a short rownd during the flight there were only a handfull of seats left.
Anyway, on a 6 hour transatlantic flight, it can't really be worth it...
On another note, I recently did BRU-YUL, for 500$, which I took.