Is money earned from writing articles and publishing them on websites that rely on advertisements containing Sharia prohibitions in their profits halal, and does the ruling differ between payment in advance or based on the number of visits?

Writing articles for financial compensation is permissible under two conditions: First, that the article is about a permissible topic and free from forbidden elements, and second, that the compensation (wage) is known and specified. There is no objection to linking the compensation to the number of visits if the rate is specified; however, it is prohibited if it is vague. It does not matter if the website relies on advertisements or if its income is mixed, as long as the article itself does not contain anything forbidden, although dealing with the owner of mixed wealth is disliked.