They already have tried. They’ve tested reactions to it by adding promos of other shows, videos in the main screen of their app, and with short reels when you move your cursor around the videos available.
Those were tests to see how people would react to advertising; granted, advertising their own content, but the result is more or less the same (besides, if people hate seeing ads for other shows on the same service, you can appreciate how that tells the company that other ads are probably more reviled)
It goes without saying that they’ll keep trying. As a company, they have a responsibility to maximize revenue and in media, major brand advertising is a cash cow.
That said, hopefully they’ve all (Amazon, Disney, Hulu, Paramount, etc.) learned enough from the Cable era and Hulu’s more aggressive push into advertising, that people are now aware that they can easily switch, or even get shows for free if the really want. Thanks to streaming, Advertising on “TV” shows has a greater cost to the “channels” — they’ll lose subscribers and viewers if they delve too far into advertising.
So will Netflix try? Yes, of course. Will it succeed? I doubt it. Technology in media is in this incessant grind to prevent people from having to sit through ads.