Below is a list of websites which promise earning bitcoins but are scams as there are no real reviews of users being paid.
Bitminer.io : There is absolutely no proof that anyone has made bitcoins with bitminer.io
A big list of scamming websites is found at the address .
Basically any website asking you to pay bitcoins and promising double returns is a scam.
Any website asking you to download a plugin is basically going to steal your information like passwords etc. Beware of such websites/plugins
I have seen heaps of websites asking you to send a bitcoin and wait for some returns in future. DO NOT DO THAT. Once you send your money / bitcoin, its gone. There is no way they are going to send it back. You cannot go to anyone if such thing happens.
DO NOT PLACE YOUR WALLET ID on any online forum or facebook. Your wallet can be hacked if no 2 factor authentication.
Do yourself a favour, save your bitcoins rather than spending on bitcoin doubling machines.
If you want to report a scam website. Submit your report here
One of the most legitimate and verified method of earning bitcoins. I do have legitimate transactions from bitcoinget and can personally confirm this works. They have daily payouts which makes it even more attractive.
5. BtcClicks is yet another website which offers bitcoins for clicking ads.
6. An Android and iOS APP called Free Bitcoin pays in Satoshi. The earning process is really slow, basically you need to install apps based on advertisements.Only when you make 20000 satoshi the payouts are processed.
7. Earnfreebitcoins is another website which pays for visiting websites/ watching ads.