For some time we are aware of companies and networks applying shadow banning, a practise where the end-user thinks they reach their audience but in reality their content is being filtered out.
More recently - 2020 - however, shadow commercials have started to surface more prominently.
A technique were companies and networks do show the publisher assets to the intended audience, but insert advertising and monetize on content without the initial publisher actually knowing about it.
According to Forbes creaters do not like the idea of shadow commericials and are looking into solutions.
A discussion about the YouTube terms of service changes can be found on hackersnews