Clearly a scammer... Fresh website, anonymous operators...
https://whois.domaintools.com/bitcoin-doublers.com

Also no TOS.

And one of the deposit addresses was used prior to the register of the website!!!
https://blockchain.info/address/14qpqvmUmQ3ibh8PUVi1H5KdrapijWprue

http://i.imgur.com/NsqsXSN.png