Examples would be the best way to prove me wrong.
Most (all?) streaming services offer an ad-free plan, and those are the most popular hybrid payment services by far.
Cable TV in the 80s started out ad free. Then they realized they could only grow revenues at the rate they wanted with ads.
Hulu: Disney+, Hulu Bundle Premium: For $19.99/month, eligible subscribers get Disney+ (No Ads)* and Hulu (No Ads)*.
*Ads will be served in select live and linear content
I won't be engaging in any mental gymnastics where there is some redefinition of "no ads" to mean "some ads".
Easy: YouTube. You cannot purchase a completely ad free experience on YouTube.
I don’t know what you consider to be an advertisement but just off the top of my head:
Many (most?) streaming services advertise their own shows and other content ahead of other content you elect to watch even on ad free subs.
Hulu’s ad free subs have some shows that show unambiguous ads.
Prime and others muddy their interfaces with others’ “channels” and content that you can subscribe to through their service. They also show other content you can purchase or rent through them that aren’t part of your package. These things are included in search, viewing UI lists, and banner ads.