There is an accord between net flix and t-mobile (Deutsche Telekom). EU law requires that customers from other EU countries are able to buy goods under the same terms as local customers. Here the terms in the Netherlands regarding Netflix are less than Poland or Germany as there is no Netflix app on the t-mobile tv-box. From reading the forum many customers are very disappointed.
https://www.theverge.com/2017/9/6/16262086/t-mobile-free-netflix-family-plan-deal
https://www.spidersweb.pl/2020/05/netflix-za-darmo-t-mobile-promocja.html
https://www.t-mobile.com/news/tmobile-uncarrier-netflix
When are the Netherlands catching up to Germany or Poland?