I’d argue they are a monopoly in the traditonal sense too. They control the whole stack like standard oil. They probably do overcharge their actual users/custom

I’d argue they are a monopoly in the traditonal sense too. They control the whole stack like standard oil. They probably do overcharge their actual users/customers (the advertisers, not you, the product they sell access to). The more you read about places like standard oil the more they reflect these modern companies.