I was able to get into a live chat with someone at Netflix and give them this feedback.
Please do not even go down the rabbit hole of experimenting with advertising. I enjoy the ad-free experience that you currently offer. The world is literally polluted with ads, and we do not need more. Advertisers will mandate the placement of ads on the inside of our eyeballs once the technology becomes available. Instead, raise your prices if it is more money that you need to support and improve your already excellent service.
If this terrible idea must go forward (managers, executives, etc), then please offer a higher priced ad-free plan.
Decades ago, cable TV sold itself to the advertisers. It's like an addictive drug. It was argued back then, at first, to justify that you pay for cable tv, that it would be ad-free. We see how that worked out. Now cable tv spends more time on ads than it does on content. And the content has deteriorated to the point that it is literally un-watchable. Instead I watch online internet TV, such as Netflix and others. I hope that I don't eventually have to shift my viewing habits again because Netflix goes the way of cable TV.
Please, please do not open up this can of worms. You cannot re-can it once opened. Netflix will gradually deteriorate into more and more ads and less and less content. Ads will end up driving decisions, including eventually the content, until the disease of ads infect the content itself like a cancer. It is a gradual process that starts on a slippery slope at a watershed moment. A watershed is like the continental divide. There is a line through the US where if a drop of rain falls on one side of the line, it ends up eventually in the Atlantic ocean. If it falls only a few inches away on the other side of the line, it eventually ends up in the Pacific ocean. This advertising is like that. Netflix is at a watershed moment that will affect its destiny. Please don't make the wrong choice.