http://ribbitchain.info/ << I don't see anywhere about the total available supply. Out of 400 million coins Airdrop (200 paid and 200 free) as team claim, where is the accounting? When will 1 Billion coins be in circulation? Is Charity the only pitch right now? Every shit coin does something for charity to get attention.
Back in April 2014 when Yellow coin did a legit airdrop with accounting, there were less than 2K users (all documented for public with bitcointalk id's. those days were altcoin peak - madness). Ribbit claims 13,750 users which is unbelievable and seems scam. Show accounting for airdrop (400 Million coins) or its a scam.
They have explained everything with details in whitepaper . 400 million coins are done and 100 million more will be minted/mined first year so first year total 500 RBR will be in circulation. Second year everyday 1.36 million approximately will be mined and total another 500 million will enter in supply. After 2 years 1 billion total supply will be in market and that 's all.