Author is Marketing Director of Dine, one of the apps listed, and a competitor to the other 3. It can't get more biased than this.
And all of submitter's comments (all 3 of them) are on stories to do with Dine.
Flagged for astroturfing.
A transparent puff piece, and more an example of how you are responsible for human interaction, not an app. Even craigslist has great success when you can write a message that evokes feeling in its recipient.