Firstly, the Summoning Chant event is specifically reiterating the summon chants from the TV show in the best performance possible.

Secondly, as to the Duel Links events:

• There’s a general 1-on-1 Duel Zone.
• A general 4 person tournament zone.
• A Women’s Only 4 person tournament zone.

Winning in the General 1-on-1 area gets you 2 points, losing gets you 1 point.

Participating in the tournaments gets you two points.

For Prizes you can get for exchanging points, there’s:

2 Points: Special Pin (Blue)

4 Points: Special Pin (Red)

6 Points: Special Pin (Gold)

10 Points: Special Protector (Maintenance Blue-Eyes) *Digital Only Item

Source

Source 2