By the logic of the poster above, the Waves platform is effectively doubling all coin supplies.

Or is this just an isolated case that he is attempting to pass to see if anyone is awake?

Why not talk about doubling the Bitcoin, Litecoin or Monero supplies?? The answer of course would be because such a claim would be ridiculous and laughed off the board... but since we are not so well known, I will take a moment to help anyone curious to understand why this is not how things work.

We need to talk about tokenization:

Bitcoin trading on Waves are wBTC.
Litecoin trading on Waves are wLTC.
Monero trading on Waves are wXMR.
And
XTRABYTES trading on Waves are wXBY.

This process does not double the supply, it creates the required tokens for the Waves platform to accurately move the real coins in and out of the coverage wallets which in turn enables accurate representation of the correlating Waves assets on the Waves exchange.

Always keep in mind that the real XBY (including your XBY) will never be transferred into the control of Waves - this is the wXBY that you see in the exchange and the only place these tokens exist is inside the Waves exchange.