Making global business harder and forcing things more local actually sounds like a great benefit.
We could use less 1T companies and more a few billion or 100s of millions level companies too. I miss the "focused on Mac and iPod" era Apple.
The follow industry conventions, visit registries of industry websites, have professional lists where companies submit their announcements (and not to the general public) and so on.
>Try your hand at starting a business and trying to sell goods or services using these methods and see how well it works.
If advertising is banned, it will work just as good as for any competitor.