Perhaps a good hacker trying to prove a vulnerability in the system?
I wish it was it, probably the world would have been a better place.
Maybe there was undisclosed pressure on the attcker.
This was my initial thought but CoinDash never disclosed they pressured the hacker.
BTW, will he still go to jail if he got caught?
This I can't be sure of but I hopes he won't be jailed. He/she returned the coins, so what's the need of going to jail for. The court may probably ask the hacker to pay fine for damages that he/she might have caused when the coins was stolen.
Maybe he wanted to show them that their security system is weak
I doubt this; he/she actually created a duplicate site and stole the coin of investors who didn't know they were in the wrong site.
I appreciate that he can do that.
Exactly. don't know whatever made him/her to do it but I wish all hackers could emulate too.