[jonnathanson]

I think the word "unpopular," in the context of the article, is referring to people's perceptions of the company's business practices and brand. Not so much to the size or engagement of the userbase. I might be wrong, but that was my interpretation.

(It's "unpopular" right now because it's come under a lot of heat in the press; perhaps "embattled" would be a more accurate word).

[hammerdr]

And neither would be accurate. Most users, both businesses and customers, are wildly happy with group on.

[nopinsight]

Citations, please.

Without knowledge about their churn rates, especially in comparison with their competitors, it is not obvious either way. There are also users who still receive the daily emails because they did not bother to cancel the subscription, but rarely look at them.