According to a 2024 investigation by Follow the Money, both firms allegedly sold environmental products (carbon credits, Guarantees of Origin, biofuel certificates) that might be a hoax. In one case, ACT was alleged to have bought thousands of carbon credits from a Zimbabwean forest project later revealed to be largely fictional. Over 60% of the credits were flawed. Their competitor STX followed similar trails, allegedly selling large volumes of near-worthless carbon credits despite warnings from market analysts.