Welcome to lemmy comments. Someone else incorrectly mentioned the Streisand effect so this guy decided to be cheeky and post just the photo.

That is the photo Barbara Streisand attempted to have removed from the internet, the effeft gets its name from this event and photo.

Control over the finalized product. You can easily shape an ad to have your exact message reach the right people, and have that ad be more attractive. With an influencer sponsorship you do not have as much control over the final product or the audience.