The best kind of advertising is invisible to those uninterested and visible to those that stand to benefit from the offer. Most good online advertising systems are incentivized towards that, but then schools incentivize towards good grades, and they don't produce one examplary student after another.

Part of the problem may be the esteem of the profession. No kid tells himself "I want to work on PPC optimization and better Ad Targeting". It's a terrible pity a profession that handles informing consumers about goods offered is so shrouded in ignorance. How many brilliant products designed by even more brilliant engineers failed in the cradle because nobody ever found out about them, or the ones that did couldn't make out their use? Because when you build a better mousetrap...you've got a better mousetrap and the world keeps using the ones they have.

Also that 2% cut of sales would be there if the youtuber were to post an affiliate link.