Sorry that’s nonsense. Companies spend hundreds of billions of dollars on FB and IG marketing (presumably because they see a benefit) and are willing to pay companies to help them do it.
Many companies large and small rely on getting most of their business from a single entity, whether that’s the US military, Ford, or contractors working at a local company.
Of course, that doesnt need to be said. But tell that to the entrepreneurs that sold businesses that rely on another platform for millions of dollars. If they listened to your advice, they would probably be nowhere as wealthy
