I saw ltcminer.io promoted by someone in a comment to a zerohedge post, and I decided to give it a try.
After spending about $60 worth of LTC, I was able to prove that it's a scam. Their website looks very professional, however, they lure you in to buy the next package above the one they promote as free, they pay if you withdraw small amounts below what you put in, and then all subsequent withdrawals stay as PENDING.
STAY AWAY from ltcminer.io!
You have no one else to blame but you and you were only ruled by your greed to make more money with little or no effort then you decides to give it a try. Two lessons from here
1. Anything platform that promises returns with little effort is 99.9% scam especially all that relates to cloud mining.
2. Any advertisement should not be taken on it's face value even if its posted by a green trust member or even a legendary member rank you are responsible for your own safety by doing a further verification of what you read before deciding whether to go for it or not.