The Doubling Scam

A friend says, "The replies are full of people who got their 2x back, so it must be real." What's the problem with that reasoning?

• Nothing; lots of replies is good evidence
• Replies can be written by the scammer's own accounts, so they prove nothing
• Replies only count if they come from accounts with checkmarks

Which of these is a "send to receive" request?

• A contest that asks you to repost to enter, with written rules
• A message saying you've won and must send 0.02 ETH to release the prize
• A project's bookmarked claim page that asks you to confirm a claim transaction