https://en.tankiwiki.com/Nicknames?attempt=1
I have found all answers i needed into this topic however i think it might be outdated, in a note it says that if i purchase crystals, the nickname is no available to claim for 3 years but i think since the introduction of tankoins a f2p player can purchase the lowest amount of tankoins for 75 tankoins on a sale. So i wanted to ask, to keep a nickname safe, do i still have to buy crystals or i have to buy anything WITH real money? Like if i bought the combo pass, is the nickname safe for 3 years?

It gives armor piercing status to all nearby ennemies (50 meters at max), this status makes their protections (module, titan's dome, boosted armor) useless for a short time if they don't have an immunity against it (Armor piercing immunity). At the same time, it gives a supercharge that benefits to the user, during this time, he can only apply critical hits, which can be nerfed only by the armadillo module, and on top of these two effects, it gives ennemy locations and their health points remaining for a short period of time.

As stated in the announcement, only the first and the third week-end of the month will receive a double crystals and experiences boost, so logically, the next week end would be a normal one without boosted fund, but you will still have time to complete the special missions.
"For two of the next three weekends (Friday 3rd - Monday 6th and Friday 17th - Monday 20th of September)"

This will last 3 days, it will end on next monday. Well, i agree that this is bad.

Yes, they already said multiple times in vlogs that they would make it possible one day to purchase clan's places for further more members.

I check your gear which is 4,4k, you are lieutenant colonel, what was the rank and gear of the guy that one shot you? If he was 9999 gears, he could one shot you  thanks to a booster shot, i know that with booster, at critical damage i could do 7k or 8k damage. And with your gear you HP must be around 6-7k

They didnt update it, this option is outdated. Report it in bug section.

Ultra containers contents are updated regularly, that is to make more odds in your side to get the exotic item that you want, gauss is taken away now but i'm pretty sure that it will come back. For example, i would like to get crusader XT, but if there are 20 exotic items my chance of getting crusader XT would be 1/20 if i get an exotic BUT if they took away some other exotics my odd  to get it would increase. That is the reason why gauss has been taken down, to make other exotics have more odds to drop, this way you can target specific exotics and try to get them. When gauss would be in Ultra containers they would took away other items maybe hopper or ares XT so you could try to get it with more odds in your side. ThunderHunter must has been mistaken, I am pretty sure that gauss XT will not move into regular containers for now as it is a recent item, around april 2020 i believe.

I don't think that it is planned, the gap between ranks is too big because there is a lack of players with the same ranks so the system has to open a larger rank brakets for a shorter waiting time, a solution to decrease the gap would be to advertise the game which is planned.

The current regular containers has changed to "old containers" because its possible reward has changed, it might be because they added new stuff to it or they could have remove something too.

The current regular containers has changed to "old containers" because its possible reward has changed, it might be because they added new stuff to it or they could have remove something too.

You can use the promocode on whatever account you want if that is what you are asking, however, the promocode will be sent in the account's nickname that you have entered on the special google form.

Maybe the player's friendlist is already full, that would be the reason which you cannot accept him.

I don't think this is cheating/multing as long as it is a startegy to win the battle. For example, in football soccer, teams try to get the ball away from ennemies to lose time as much as possible. Even if it is considered as a non fair gameplay, still everyone can do it as a strategy to get the win.