That laundering angle raised by @DarkDays is plausible. If that is the case, I'm curious why would the owner still use the same wallet after that transaction?
I also checked the recent sent transactions and it is now back to its "regular programming" with gas price at 60 gwei. Let's see if he/she does the same again after collecting more eths.
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Right, these mistakes or these types of cases are very rare. After updating Myetherwallet, any ERC-20 tokens transaction cost warn you before sending it to another wallet. I just want to know why there are different costs in Myetherwallet to send the same tokens? Could be there is no fixed cost, which depends on the different situation of blockchain!
You did not even read the link provided by @TimeTeller did you?
As fas as ethereum blockchain is concerned, the gas fees fluctuates depending on the volume of transactions that goes into the network. That also means it's the free market who dictates what the transaction fee will be. Thus, there can be no fixed fee. It's just coded that way.
I don't know if it's the same case with other blockchains though.