What country are you in? I've never seen a commercial on Netflix in the USA, Japan, or a few weeks in Europe. I guess there's probably some product placement here and there, and the auto-playing trailers are almost as obnoxious as ads?
Product placement is pretty common in Netflix's own shows, however they do it well so it doesn't feel like an ad. For example KFC in Stranger Things and Dunkin Donuts in House of Cards.