YES! Everything is a scam. Stop buying all crypto at all exchanges. Scams everywhere. I am scam, you are scam, we are all scam.
Other exchanges doesn't using coins of clients for masternodes.
actually this is untrue
TDAX has introduced Znodes, but they have a good practice there.
every 14 days they deduct a fee, for server costs and maintenance and share the zcoin rewards with customers holding zcoin in their balance.
I don't mind exchanges making masternodes as long as they follow same practices as TDAX has.
This way customers waiting for their listed coins to sell can get a piece of the pie