You have to wonder about these supplement companies who are desperate to get authenticity and use bodybuilders who have never tried their products. What does that tell you? It confirms what I have always believed: supplements are mostly a waste of money. I say mostly because it depends on what your goals are. If you use a weight gain supplement then that is sensible. If you think you need more protein, etc., you probably don't know much about nutrition.
It depends on the company really. If you buy the hot supplement of the day when you start out and it doesn't work, you should know that those things are not the answer. Of course I bought all that stuff in my first few years thinking that it was the missing link between me and the pros or guys in the gym. Then I found out about steroids, and then I tried them. That closed the door on all legal supplements bridging the gap.
However there wasn't really a get big or BB.com then. There was message boards, but I did not think to look at them. The internet was still 56k, thus I would not have the patience to participate anyway.
You can use protein powders to supplement. I took one today and had a protein bar as well, plus a roast beef sandwich with cheese and a small pizza. 2200 calories or so, and that was that.
Yes, the guys shoveling down protein and not realizing that more is not better without paying attention to calories and so forth do not know much about nutrition, but if I sold protein you can bet your ass I would be on here telling people you need a gram and a half per pound of bodyweight, lol. Yet in both Flex and M&F they will espouse that, but the diets are always calorically controlled, which is good.
Either way, it is the customers responsibility to research things for themselves, and it is the company's obligation to make sure the formulation makes sense, the claims are somewhat truthful, and that it is safe/what is on the label is in the product. The rest is up to us.