A customer sips her coffee in Starbucks' Mayfair Vigo Street branch in central London

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Starbucks just announced changes to its popular rewards program. Many items, like free coffee, lattes, and sandwiches, will soon be more difficult to redeem. Some customers are angry and say they'll stop buying Starbucks in response.

Starbucks just announced changes to its massively popular reward system, and some customers aren't happy. Under the new system, which goes into effect in February...

Continue Reading Some Starbucks customers are furious about changes to its rewards program that makes most free drinks harder to redeem