[SmartJerry]

The way to enforce it is with with monopoly or collusion rules. Google has 39% of all digital advertising worldwide according to a quick Google search. However, I think digital advertising is too broad to even be considered a single category - you should have digital advertising of images, text, video, sound, and so on. Television and radio are different categories, why would you not do the same online? They have the capability to be a monopoly or collude with enough companies to exert monopoly power that they can abuse in some of those categories. Combine this with the fact that they receive special legal protections from liability for user posted content. Their protections against user content should be less if they are editorializing or treating content differently the content. I don't think they should be liable for user posted content, but they should have a responsibility to treat content equally, subject to fines. If they are going to demonetize or ban Russell Brand for a unverified news story, then if their CEO or even the president of the US receive an unverified news story against them (as the president has), they should get the exact same treatment. This is because rules enforced unequally harm content creators and users. The harm comes by way of lying to people. If every person who likes the color blue is getting demonetized, without notifying users of the rule, but every person who likes the color red gets promoted up, a user would be tricked into thinking the whole world likes red. That harm is tangible enough when it comes to important or political topics to deserve fines. The harm coming from not explicitly saying your rules. We protect a consumer from tobacco by forcing them to tell the truth about the product. THe same goes for tech. I'm sure some will say well these kind of lies aren't that bad, but they are, these are peoples lives and for many their source of income and to get treated differently on a whim tricks the content creators (essentially employees) as well as the users.