[theorique]

I've never bought anything because I saw it on facebook or in a google ad or anywhere else like that.

Can you be certain that this is true? Perhaps you didn't click through (I don't either), but what if your unconscious mind saw an ad that you did not register consciously.

[dhimes]

You can never falsify that, obviously, and I think a lot of the web-ad industry like to keep that FOMO in front of the advertisers. But I'm fairly certain. Vacations? Nope: I have my way of deciding and that's how I do it. Car? Nope. Calendar/planner? Nope. Pencils? Pens? Grill? Pants? Nope Nope Nope Nope. I'm hard-pressed to think of the last brand I learned of from an ad. Books? Usually from here (also planners, cars, etc.)