I do not know all the platforms and all the brokers but I can tell you that this thing stinks a mile away. xxx% every yyy days is pure madness and since they ask to spread the word there is a risk that this is a Ponzi scheme.
Do not trust it, ask them to withdraw your money and see how they behave...
(I would close the account immediately and withdraw my money, the account receivables are useless because they can show you what they want.)
See also the videos:
How to choose your broker