Roll value and hand signs on Amiibo cards?

[HappyTails]

What are those suppose to represent? Also, for someone who doesn't have Amiibo cards, I sure am asking a lot of questions about them. -_-

 

[John Wick]

I'm wondering the same thing!

 

[HHoney]

Amiibo Festival. They're used in Amiibo Festival

 

[Twisterheart]

I think it's for Amiibo Festival but I'm not sure.