Google+ (GOOG), which picked up 20M users in just 3 weeks, could be having trouble keeping those...

|By:, SA News Editor

Google+ (GOOG), which picked up 20M users in just 3 weeks, could be having trouble keeping those users interested: a study from Bime Analytics estimates 83% of Google+ users are "inactive." While a large % of Facebook and Twitter users are also inactive, those users were accumulated over a long period of time, not two months.