It's often to attract more viewers and increase ratings. When a story gets a lot of hype, it catches people's attention and they tune in.
The main reason could be commercial. Hype creates buzz and gets more ad revenue. Also, some stories are hyped to push a certain agenda or because they are considered 'clickbait' that will draw a large audience.
The news might cover only specific stories because of limited resources or because those stories fit a particular agenda or narrative. Also, sometimes it's based on what's considered most newsworthy at the time.
Certain news stories draw public attention because they're timely, like covering a natural disaster as it happens. Or they might be unique and unlike anything we've seen before. Also, if they involve well-known figures or have a human-interest angle, people tend to pay more attention.
Maybe they lack sufficient evidence or reliable sources to be published.
News channels often choose stories based on their newsworthiness. They look for events that are timely, significant, and of interest to a wide audience.
Maybe they have their own editorial priorities and focus on specific types of news that they think are more relevant or popular.
Audience demand also plays a part. Some stories are very popular, like those about celebrities or major global events. Online channels repeat these to attract more views. If a story about a famous actor's new movie was successful in getting clicks the first time, they might repeat it to catch the attention of new or forgetful viewers.
Well, they usually have teams that monitor popular tweets related to news. When they spot something relevant and newsworthy, they investigate and verify it before picking it up.
I think it might be because 30 marks a certain milestone or it's a tradition within that particular news organization. It's hard to say for sure without knowing more about their internal policies.
It could be because they have more popular themes or characters that attract readers' attention.
Some think it's because they want to fill up space or meet publishing quotas. Also, fluff stories might be seen as less risky and more likely to appeal to a broad range of people.