You are aware that Dash Locked Staking on Binance is limited to 50 Dash ? Difficult to see that eating up the capitol value of the chain and spitting out masternode pockets, as you suggest.
You seem to have interpreted that post the wrong way around.
It's the trustless masternode rewards that eat the capital (because they come straight out of the chain at zero difficulty).
Not the staked Binance capital, which generates a return based on economic activity external to the chain which therefore ADDS to the capital value of the chain.