I'm a day behind so still deciding.
Got mine narrowed down to using it on the Lynx towards the tier 9 wheelie just because that's currently the only tank/line I have that's still at tier 8. Or I'll use it on my recently acquired Obj 705 to use on that 130mm gun that's tbh a required xp sink as I doubt I'll ever use it.
I used the last 40k on the AMX 65t to get out of that steaming pile. Which I think is what a lot of other folks do with it. Use it on tanks they really want out of quickly.
Anyone using it to force feed a crew member or towards free xp to convert later?
Anyone wondering about the previous statement. If you put it on an elited/prem tank with accelerated training on it's my understanding it all goes to the lowest trained crew member. If accelerated training is ticked off it would go to free xp to convert later with gold.