I don't own mmm, we all know it is own by mavrodi, so how on earth will I scam them
They send you 1btc, you don't send them 1.5btc... that's how you scam them. :/
No one is sending any coin, all I would give them is my referral code and show them how to provide help in MMM . I don't and will never collect anybody's money in other to double it.