Collects and sells data
Doesn’t offer a private mode
Offers private mode; however, if you turn on private mode app doesn't allow retweeting.
Can be held liable for postings
Allows direct messaging
Unable to be monitored
What Twitter says, "From breaking news and entertainment to sports, politics, and everyday interests when it happens in the world, it happens on Twitter first. See all sides of the story. Join the conversation. Watch live streaming events. Twitter is what’s happening in the world and what people are talking about right now."
What SGS says, "Stay on-brand and be aware of what you tweet and retweet. Twitter is forever."