From Dota 2 Wiki
Friend Recruiting is a system that allows players to invite friends to Dota 2.
- Partying with a recruited friend will grant both players a 50% Battle Bonus until the recruited friend reaches Profile Level 10.
- Each player can only be recruited by one player.
- Recruitment status can be tracked in a tab on the Player Profile.
- A player must be on your friends list in order to be recruited.
Points & Leveling
- Players will earn recruitment points when a recruited friend reaches Profile Level 1 and 50.
- Players will gain a recruitment level when enough points have been earned.
There are currently no rewards for recruiting friends, although some strings in the game files indicate a reward system in the future.