The firm revealed that customer satisfaction of the subscription is at 97%, with a renewal rate of 93%.
"The success of PS Plus is contributing in a big way to driving overall PSN sales, as our last quarter was the biggest in terms of transactional sales in PSN's six-year history," a spokesperson told Games Industry.biz.
"The immediate consumer reaction was completely off the charts, and membership sales more than doubled during the week of E3."
Launching in 2010, PlayStation Plus provides users with entire games and discounts, exclusive access to betas and demos and early access to certain new releases.
Earlier this month, users were provided early access to the PlayStation All-Stars Battle Royale beta.
PlayStation Plus rewards will be coming to Vita users next month.
Watch Digital Spy's video review of the super slim PS3 below: