What is the ruling on investing in a commission-based product selling platform whose operators claim to invest funds in real projects based on a profit-sharing model, with a guaranteed profit of 99%, almost zero risk, deposit and withdrawal fees, and a tax on early withdrawals?

There is no legal basis for charging a 3% fee on the deposit amount if it is not calculated from the invested capital. This could invalidate the Mudarabah contract, because it involves stipulating a known sum of money for the Mudarib in addition to the profit, which is unanimously considered void.

Similarly, there is no legal basis for the imposed tax (19%) on the amount withdrawn before the contract expires. This is considered consuming wealth unjustly.