One way to view HP while not necessarily being the proper way or the only way is it is a business enterprise providing a 'mixed market' economy and it, too, exists within a 'mixed market' economy within 'Google,' which exists in a 'mixed market' economy upon the internet for the purpose of conducting commerce.
Personally, I do think they play favoritism with their resources any more than each individual author/writer does with their resources. What is read (sells) and is not determined by HP. It is determined by readership, popularity, and social trends upon the internet ( the whole) composed of countless web browsers. As mentioned HP lends being a member primarily of Google with associations with other browsers (the parts). That is possibly its economic structure.
We borrow (knowledge & experience) from HP and it is free of interest (the only cost is effort by doing, learning, and seeking help with those varying unregulated costs). We have the opportunity to invest, seek a gain (articles read), maintain capital (present articles and their positioning) in the varying market structures - community (followers, following, others), regions - specific category and sub-categories, state - HP, nation - Google, and the world - other browsers upon the internet.
HP provides a platform for launching a vehicle. It does inspect each vehicle. It provides a map and offers methods of guiding the vehicle. Vehicles are recognized based on criteria while being random. The builder and driver of each vehicle is independent, autonomous, and has liberty.