Much as some people have been scammed, I don't think the transactions are that big. What we are seeing are just fake transactions pulled off from the Ethereum live transaction data. They just pull transactions that are sending a given amount of ETH and publish it on their web page to make it look like they are actually paying.
For example i just picked up one of the transactions IDs they claim is a payment(some many i have checked if not all are fake)
https://etherscan.io/tx/0x0653392053da0d99feda7e54ce0e1d5201f38fd1401302a51d860f223cd3c3b1And guess where the ETH is being sent to?
To an IDEX contact address
Seriously, why would someone send a payment ETH to an IDEX contract address and how would they do it without having full access to ETH Online main wallet's private keys
Also, ETHOnline website is a direct copy paste of BTCOnline which is also a ponzi scheme deploying the same tricks. I guess it's the same scammer operating all of them
They even have the same addresses which are even fake