Starbucks is seen as slightly vulnerable due to its shift to a dollar-based loyalty program from one that used a transaction count to dole out freebies.
"We feel excited about the change to Starbucks' loyalty program," says Travis.
Previously: Starbucks tightens policy on rewards giveaways (Feb. 22 2016)
Previously: The math behind the Starbucks rewards switch (Feb. 23 2016)
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