Not A Scam

You but the expensive scented laundry detergents and your clean laundry does not smell of wildflowers or the ocean breeze.  Is this a Proctor and Gamble scam?  Not at all. It just means your clean clothes are not really clean.
Baking Soda simply makes detergent products more efficient and takes away that lingering musty smell.  Be aware that because it makes soap better at its job, you may need to slightly dial down the amount of detergent you currently use. Breathe deep again.