My answer would be this: A number of actors in society could take action to move away from companies that violate their privacy. The government has spending powers for advertising, but often the case is made that individuals also have a choice and could decide not to be on that platform. The fact remains that Facebook has two billion users and it's not easy for an individual to withdraw from that service. It's possible, but it's not obvious.
On May 7th, 2019. See this statement in context.