I joined Gladiacoin where they agreed to pay 2.2% per day when you bought pakcages w/Bitcoin. Right after joining they changed their % to less, they also had several days where they didn't pay, then they said you have to pay a 15% fee or they wouldn't give you your earnings. Then they closed down. I lost about $400. Then there was Jet-coin, started at 4%, then went down to 3.3, then went to 1.1% per day.
Then they said they coulcn't pay due to the crypto's going down. Now they are suppose to open back up at 2%. I lost about $1,000. and friends of mine aIso lost $. I was also in Traffic Monsoon which was a scam of theirs as well. They apparantly are the start up of many start ups accross many countries. Scammers to the bone.