Links that have the purpose of advertising your youtube channel aren't allowed, or any video that contains any violation of the game rules (such as insults/profanity etc...). However, you can still post links to songs/ other videos that have no relation to the points given before. :) 

Hello, I would suggest that you share your idea in this section but after reading the rules of it. As you won't get any definitve answer here, since the only people that have info about this are Devs and CMs.

Closed.

As far as I know there is no such thing that has been officially published. But there is some good initiatives from people like @DaringDeer, Thanks!
You can PM him if he is done with updating the stats.
Closed.

Hello, reputation can be gained by getting likes on posts and topics.For example, before I gave you a like for your question, your rep was 28, as soon as I liked it, it increased to 29. So one like equals +1 reputation. 

Hello, the update clearly states the following:
 
Check this page for more.

You have to gather 2000 stars in order to finish this month challenge, check this page for more info on challenges.

Hello, please keep an eye on this section for any news and matters regarding events. Also for an explicit answer to your question, check this announcement here.

Hello, Contact the help desk via email on help@tankionline.com, they should be able to guide you on that matter.