Dive Summary:

• The Starbucks loyalty program has about 6 million members worldwide and is adding almost 80,000 new members every week.
• Recently, the company announced it was extending the reach of the program to any Starbucks product bought in a supermarket as well, effectively doubling the amount of places the loyalty program effects.
• While Starbucks does not release any data on how the loyalty program effects consumers, by expanding it, their actions seem to suggest it increases consumption across the board.

From the article:

Brotman said the company is adding about 80,000 new loyalty members a week. By the end this fiscal year, he said it plans to push total membership to 9 million, which is double the number it had at the end of October. Currently, he said there are about 6 million members.

A Starbucks spokeswoman did not have details on how spending patterns change when people join the loyalty program.