If it's not poloniex nor mintpal my guess is that it's btc38, but how could we really know?
We probably need some chinese guy to confirm. The btc38 website is basically unresponsive and timing out from here, I couldn't even run automated translation on it because I could even see complete pages :/
Meanwhile, the cold wallet of btc38 riecoin is public as RUrTHyyKiPr1SkAraTHvSY9d3vsdQHBjca, which has 3487644.
Therefore, we know that more than 50% of Riecoins are sitting in btc38.
Great to know! do you have some official link/url about it?
RUrTHyyKiPr1SkAraTHvSY9d3vsdQHBjca has only 550k however, and so far isn't related by taint to the large exchange wallet (
https://chainz.cryptoid.info/ric/wallet.dws?87250.htm), where does that 3487644 figure comes from?