Nothing against the berry/your product (although I find adding $1.30 of powder to each meal crazy) but is that how weak-willed the average person has become?
More personally, why would you need this for Greek yoghurt? Are we talking about actual high-fat-high-protein Greek yoghurt made purely from milk, or is there some 'Greek(-style) yoghurt' that actually tastes horrible? Everyone I know seems to love pure Greek yoghurt, with at most some berries or granola on top.