What is the ruling on investing with a company that pays a fixed profit of 20% of the invested amount every three months, and is it permissible to take a commission of 38% for introducing new investors, knowing that these percentages may change according to the company's profits? If the transaction is Haram (forbidden), is it permissible to take the money and spend it on charitable causes?

It is not permissible to invest in the company in the manner described, because the contract stipulates a common percentage of the profit for the investor and for the company. This percentage is not added to the capital but becomes due upon the realization of profit. It is not valid for the company to guarantee the capital or an excess profit, and it is necessary to avoid dealing with companies that do not adhere to Sharia regulations.