The problem that providers like Youtube have with the "pay to remove ads" model is that the people with enough disposable income that they're willing to pay $14/month to remove ads are the same demographic of people that advertisers are willing to pay the most to show ads to. It's the same reason why if you watch TV during the middle of the day, the ads are all for medicine (paid for by your insurance), personal injury attorneys, (paid for by the person you're suing), and cash advances for structured settlements (i.e. if you already have a settlement paying $500/mo for 30 years but you'd rather have $20,000 now) rather than for anything you actually have to buy.