Not annoyed by this event more bemused.by it, assuming it had come in on time and worked flawlessly what was its point.
You can win a lot of manual fire extinguishers if you win enough games, but you can buy loads of fire extinguishers just by playing and of the consumables they are the least used.
You get tracked and lose modules most games so repair kits are a constant need, but how often do you catch fire, if you do catch fire how fast can you react and use a manual fires extinguisher.
The win requirement is a pain and combining it with having to be in the top 7 an additional pain, Its a team game no one can guarantee a win.
You position in the team after the battle is more down to the individual.
You need good rewards to make anyone want to complete under those conditions and having to repeat that 50 times would get me 50 manual fire extinguishers and a days premium.
The code worked with 4 days remaining so yeah that's not going to happen. 
If you happen to have the M48A2 Raumpanzer you can try to win 7 battles and be in the top 7 and get a medal.
Had you abandoned either the win requirement or the be in the top 7 this would have been an ok event, even so I will take part but that's just because I will be playing the game for other reasons and this one will just happen.