Because the greedy dev rides the hype masternode train, the story is like this: dev makes a new coin or clones eth and has premine at least 5% saying that it is to develsent further from the coin. Then they sell several masternodes before the coin launches to the initial biders usually for a few btc per node each, launching coins and letting the market take over when they leave it and make a new one within 3 months or less and the circle continues.
Tanks you