The world of cryptocurrencies is still very young, and the information is not widespread, there are many scammers who have seized the vein ... Fortunately there is a site that includes all the "scams" known to date, which is regularly updated: http://www.badbitcoin.org/thebadlist/index.htm
It's important to take a look, if you want to test a new faucet site, casino with bitcoins or cloud-mining, for cloud mining, or it's a scam or it's not really profitable (eobot is not a scam for example but the RIO (return on investment) is very long), except the interesting initiative of Hasheur "fair mining": see here.
Feel free to leave a comment if you know of other scam sites that would not be in the list!
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