The social media age lends itself well to the horror-thriller genre, but most films turn out to be a shallow, cautionary tale about the toxicity that comes from our narcissistic desire for more fan engagement and obsession with accruing “likes.” That’s not the case with “Influencer,” a creative and fresh take on movies set in the TikTok and Instagram era. Director and co-writer Kurtis David Harder‘s film embraces the online influencer culture with a project that has shades of “Single White Female” and “Sissy,” and it’s filled with enough psychological suspense to keep you on the edge of your se...