There are so many proofs around telling you it's a scam. https://steemit.com/bitconnect/@crypto-investor/the-bitconnect-whitepaper-maths-of-a-ponzi
Why they close? Is the law from Texas wrong? Where are all the bitcoins? They refunded your investment with what? Useless tokens? You can say that the poor guys from bitconnect made all perfect and they just wanted to make you win billions and billions for your referal codes around, but I again repeat it's a ponzi scam. Or do you see other coins shutting down? Don't you think they sold all their coins for BTC before the announcement?