Their business model is that they sell papers (or access to a website, or get ad views). They can do this by reporting facts, but generally it is easier to do

Their business model is that they sell papers (or access to a website, or get ad views). They can do this by reporting facts, but generally it is easier to do this by reporting stuff people want to read, which includes facts and non-facts and things that may or may not be factual. This also generally involves summaries which aren't factually true as they drop relevant details, but which are close enough that people tend to tolerate them (see any reporting on a scientific paper ever). Also, an "an anonymous source said X" could be factual, but the implication is that X has some level of truth when the only known fact is that in reference to that X was said by an anonymous source.