They all are Individuals who just give you random numbers by saying that it is leak number directly from company. Some person ask you to pay in advance and some person ask you to pay a percentage of winning amount after you win the game. If you person told you to pay after passing the game that doesn't means that you will be in profit or will not lose your money. Becouse the person who want you to pay after passing the game will also give you a 2 or 4 jodi of random numbers and they will told you to invest big money on these number