There is currently nothing can do game wise with the badges you receive from others. You can however send them to others with a 350 character message. I would recommend you take a look at this page (https://en.tankiwiki.com/Gifts) if you would like to learn more about gifts.
Thank you, MSI.
Why do some people get 400 normal reward crystals and then 800 bonus crystals?
Nevermind, new question: How long does it take to rotate the kits?
Thank you, so you're certain I'll receive the kit?
Customer support service by UserEcho