Fortune 500 companies sometimes can’t resist the social media mistake of subtle commercialization, which usually backfires. Here, General Mills eulogized their hometown legend, Prince, by being too cute with a Cheerio dotting the i. In another General Mills advertisement from the brand, Hamburger Helper, their “helping hand” mascot, “Lefty,” a four-fingered, left-hand white glove was pictured and referenced. “Respect for the home …