You have to remember there's a huge $$$$ market for that stuff. There's money to be made! Look at all these TV shows. Over half the time is spent selling you this stuff and they show them using it but I never see any deer react to it.
I carry that stuff just in case if things are slow to play with but don't expect much. I did rattle in a doe last year! She came running right up to my blind. No bucks though.
And I won't pay extra for the "joeshmoe" camo pattern or the "scentlok" (which to me is BS) either. I've hunted for almost 50 years long before that stuff came on the market and the biggest deer I ever got was the first year I hunted.