I have some doubt when i look at market price though. At this moment[1], the price on Binance is $0.5117 (VGX/USDT) while price on Coinbase is $0.514 (VGX/USD). The difference is only about 0.45%, so it's hard to perform arbitrage unless your account trading volume is extremely high where Coinbase maker/taker fee is 0%/0.05%[2] while Binance maker fee is 0.02%/0.04%[3]. You also need to consider withdraw fee which isn't cheap on ETH network.
If indeed he's doing arbitrage, he would still be making profits.
Looking at the current balance of tokens in his address, there are some 1,161,751.89834346 VGX that's approximately $580,000 and this is minus the tokens that are still in the exchanges. He could easily hit over $1M
The seemingly small price difference is very likely to get him some reasonable profits, as you can see he keeps doing it repeatedly. Who knows, he could be seizing opportunities where the price difference opens up to even over1% otherwise if the ETH network fee is the issue, it makes no sense moving coins in and out of the exchange without any trading.