[...] I was just thinking that IDAX was a decentralized exchange so how can they scam when everyone have control over their private key in decentralized exchange ? Is it so ?
You're thinking of
IDEX (with an E, not
IDAX with an A)...
Oh so Idax and Idex are two different exchanges, I have the IDEX exchange in mind when i saw this post. These two names are too much similar that anyone can get confused who did not know that IDAX exchange even exists.