He is refunding 90% because he sent 4BTC to another address, probably one he does not own.. look in the blockchain.
I'm returning everyone's investment out of my own pocket.
How do you, your money is coming from the 16hZ1NdkvwLsPFADFcmoZwWgnXpgLHGZAK > 13izUnFG7RTwpmumiL2CqAhrJqYKHnBBEu wallet circulation
Please return the rest of my.5 BTC, otherwise I will send more content