I am writing about the sites where you have to make a deposit before buy and the site offers to act as a MM in deals.
How could I know when they are trying to scam me? In general, how do I know if a MM site is trusted?
Most commonly scam sites are those who offers a huge advantage to a person whose interested to invest money on them. Usually in scam site, you could see that the number of members in their site is low. Also, if they aren't active or doesn't known in a forum, then that site could be scam.