# Useful

- [Wheel of Fortune](/en/getting-to-know-the-site/poleznoe/koleso-fortuny.md)
- [Promo codes](/en/getting-to-know-the-site/poleznoe/promokody.md)
- [Referral system](/en/getting-to-know-the-site/poleznoe/referalnaya-sistema.md)
- [Telegram bot](/en/getting-to-know-the-site/poleznoe/telegram-bot.md): You can activate the bot at the NPS \<Additional service> Assistant