There are lots of mining sites which gives free coins but you cannot withdraw. How true is this one? I cannot even withdraw what I mined. How to learn more from mining?
Sites that are offering mining aren't really mining, that's why you can't withdraw anything. If you want free coins, use a faucet, or look for a giveaway on the forum. Sites that are offering free mining are always scams. They will make you think that you have some free coins awaiting and that you have to pay a small fee to upgrade the account first to be able to withdraw. You pay them and it's gone
