The Cardoholic Badge is about the number of games a user plays in a single session. And it's awarded as follows:

• Play 10 games in one session to earn a bronze badge.
• Play 50 games in one session to earn a silver badge.
• Play 100 games in one session to earn a gold badge.
• Play 150 games in one session to earn a ruby badge.

For more information about our badge system, check out our blog: https://blog.jawaker.com/jawaker-badges/