There is nothing wrong with RLGz address, that's a miner.
I think these are coins that were abandoned from disabled Poloniex users who did not complete KYC before the deadline. IMHO they are as good as burnt coins. Some people speculate Circle/Goldman sachs could dump them in the future all at once, but that would be illegal so it's very unlikely.
That is crazy, I always thought these random bit moves on exchanges and regulators is just another scheme to steal some shekels out of people.