The site is Russian service, providing help with buying the in-game currency in League of Legends for those users who don’t have credit cards.
The app makes use of asymmetric data encryption, email and SMS alerts, XML, convenient operator interface and report generation.
Why not to use the ajax validation?
One of the requirements was to have as little JavaScript as possible due to some use cases of the service. This is why the only place where js is used now is currency list loading. I will update the site to use Yii’s js validation if anything changes.
Yeah, it is the one. It has 3 servers currently: north american, EU west and EU east
Funny there is a hero there called “Master Yi” my favorite 
Added client-side validation 