You can visit their website https://icerockmining.io/ or ANN thread https://bitcointalksearch.org/topic/old-2196082 for more information.
This is a good opportunity to invest your funds due to they offer profitable investment for everyone, whether you choose to be an investor and get tripled profits of your initial capital on May or be a miner for 2 years contract.
The ROI only happens if the currency's price increases. When mining on the cloud people are never able to recover the same amount of coins that were invested. That is what makes this investment worthless (talking about legit cloud minings). And if the coin to be mined is an AltCoin it's more dangerous, because these AltCoins are very unstable and have less guarantees of success than Bitcoin.