For me, Minereum looks like a scam project - they have airdropped their tokens to thousands of wallets, but the tokens are locked until you pay some ETH. Even after that, it takes years until the full unlock.
These are the little details noone agrees with. Only dishonest scams will not be clear about how things work. When they ask for money in order to "unlock" something or another thats when you know beyond a doubt that it is a scam. You must pay and there is a massive unlock period? These little details make it hard to trust them and just makes things more confusing and is unnecessary.
There was no massive unlock period and the coin will give to you from your self mining address. The developer was taking your ethereum instantly while you must wait more than 7 years to get your ROI.
This is a new shady scheme. So many people have also talked about this.