In that sentence, they’re not referring to Ecosia specifically. Rather, they’re implying that you can choose a search engine which aligns to that value. A little weird to include it with no examples, in a post specifically about Ecosia, but I believe that’s the intent.

Not the OP, and I don’t actually know, but paid streaming services differ from YouTube in that everyone who accesses the content is paying for the service. On one hand, you can validate that everytime a video is served, it’s served to a paying user. On the other, you are receiving revenue directly from consumers to fund the infrastructure to store and serve the videos.

YouTube, on the other hand, stores significantly more content, for free, and can be accessed for free, without being signed in.