That’s the sound of Ryan Detert’s invite-only mobile app, Influential, trying to get the attention of one of his select group of users. It emerges from a purse or pocket to signal that a brand such as Kellogg's or Corona is offering money in return for posting a promotional message on social media. If a person taps to agree, Influential can send out the paid message on one of that person's accounts.
In return, Detert’s company will send them a check for anywhere from $500 to tens of thousands of dollars per post.