I see so many services offering to double, triple and multiple in all possible amounts the coins you put to them. This doesn't sound very convincing to me but some of them are offering the list of blockchain transactions as a proof that coins were credited. Is this pure scam like I think or is there a possibility to realy make some coins? Would like to hear your thoughts and experiences.
The reality of payments are behind the fact of the popularity of the site . Usually site goes publicity and after got a big publicity the investment Comes in big numbers , so that they pay for most of the 40% users and decieve to the 60% of the users .
In other words you can say they will accept payments from everyone but pay to for particular users .
Another a big thing in these scam sites is that the most of investment are made by the owner of the site and paid to himself that is all to attract the user , the most common example for this is coince.com .