It's not a conscious decision, your mind is familiar with some of the brands more than others, for whatever reason, and that tricks you into trust. Sure, you still might look into reviews and stuff, but your mind has already been primed to some extent in what brands you even consider.
Just step outside the highly commercialized part and you'll be surprised.
Exactly why they should be illegal!
Allowing people to spend money manipulating us into giving them money so they can spend more manipulating us into… is mad.
That is not to say that it doesn't work. The fact that the family member got into the pyramid scheme in the first place is proof that some people are susceptible to it. But also, none of us (the family) gave in to her advertisement, so obviously that's proof that a lot of people also aren't susceptible to it.
I've asked them but they may be asleep