(Reuters) - Spotify Technology SA on Wednesday forecast current quarter revenue largely below analyst estimates, as the streaming service spends more on promotions to keep and lure listeners in its battle against Apple Music and Amazon.Shares of the company were down 5% at $148 before the bell.Spotify's paid subscriptions rose a better-than-expected 29% in the fourth quarter largely from discounted promotional plans, but revenue missed Wall Street expectations.The company ran several campaigns..