Jan 15 (Reuters) - Spotify will increase the price of its monthly premium subscription plan by $1 to $12.99 in the United ​States, Estonia and Latvia markets, the Swedish streaming platform said ‌on Thursday. The company said its new pricing would take effect on consumers' billing dates ‌starting in February. Subscribers will receive an email about the price adjustment. Its shares rose nearly 1% in premarket trading. Spotify has relied on price increases in recent years to drive growth. Last year, its f ...