

There’s a reason many big corporations have pulled out of online advertisment and focus on print/radio/TV/sponsorships instead: The effectiveness of online advertisment can be measured and it sucks royally.
The whole concept of marketing is just a huge game of “the emperor’s new clothes”. Nobody wants to be blamed if they stop doing marketing and it turns out to actually do have an effect, even if everyone secretly knows it’s garbage.
You might not. Finance and wikipedia does.