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Ah, so its based on your wager activity. So many sites, hard to catch 'em all!
I have to be honest, those coins require you to store like millions to see some handsome returns due to the tremendous market cap. Just like the other "projects", tens of dollars would net you like 6 figures of them coins

Just wondering, how many casinos do you actively patronize?
2-3 at the time! The ones I like, and the ones that have more to offer!
Few spins here and there, it's not the big deal to be active in more places! If I have to be honest, I would say I am taking advantage of bonuses and promotions! So which site offers more I am there! BC.games is a good place to be with all ongoing promotions! But in the end, I guess everything depends on the level and wagering!