Genuine social proof is always the best. Smart marketers don't try to get you to buy from an ad click. They want to move you one step down the funnel, which is

Genuine social proof is always the best. Smart marketers don't try to get you to buy from an ad click. They want to move you one step down the funnel, which is usually getting your email/contact info if it's the type of product that has a longer nurturing process and sales cycle.