Stargames Challenges
On the one hand, the Stargames Challanges are meant to be a place where gamers (core and casual) can enter a competition versus professional individuals to challenge them in a 1on1. If they win against the professional player they win a prize.
On the other hand it's meant to be a platform where individuals can join a leaderboard competition based on a specific timespan. Whoever is rank no 1 after a certain given time, wins a prize.
Summed up the Stargames Challenges are a tournament/competition series of different kinds, easy to enter with a fast approach and easy opportunity to join and win prizes.