If the EU was making a directive on this topic it would not differentiate between company sizes because it thinks that the company size has a relation to how ad

If the EU was making a directive on this topic it would not differentiate between company sizes because it thinks that the company size has a relation to how addictive their product is. The reason why it would differentiate on size is precisely the reasoning you presented in your previous post. Because it doesn't want to create moats around big existing players on the market. If you look at the act the GP linked to you'll see that one of its purposes it to tear down a non regulatory moat that those big existing player have. And because a small company, without a doubt, has less potential for harm on a societal level than a big company.