In order to avoid unanswered messages & invites within a platform, your both player and team profile have an "Activity" badge, which indicates activity level on the platform based on the number of visits.
Most active users will show up on top of the search.
New-comers (less than 7 days ago) will always be on the top.
User Activity Level is divided from 1 till 4 where is 4 - Most Active and 1 - Inactive player.
Activity Level is displayed after Username.