The point is that economy and money flows don't care about what you perceive as useful and utilitarian. If there is an opportunity to capture the public space and hijack your eyeballs and attention, someone will try it with ads, product placement, or propaganda. Most population would happily accept rentier money from hosting a billboard or poster on their estate. Most people posting on IG aspires to be noticed by major brands, successful sport players are cancer on its own in this domain. Most websites have the tracking and ads embedded. Etc.