That review reads like a troll. For one, apps can't get access to contacts, etc without prompting the user, unless they've found some exploit, in which case it'd be pulled pretty quick if it's been cornered by CNN.
Next, I've never seen an ad in the app. And certainly never when the app is in the background. Pro tip: bit torrent sync doesn't support background app refresh so it's limited to around 10 minutes of background tasks.
Bottom line, it's a bullshit review.