Supporters of Donald Trump before he announced his bid for the presidency at the Trump Tower on June 16, 2015. It later emerged that actors were hired to cheer the announcement.
The start-up 'Crowds on Demand' supplies actors for almost any type of public event, including for grassroots activism campaigns. In most cases this never comes to light, even to protest organizers.
The business began by supplying guests, bodyguards and paparazzi to celebrity parties to raise their profile.
The service is also popular for PR stunts and product launches.
'Easy crowd' offers a similar service in Ukraine, inspired by the 'Orange Revolution,' and the business model is spreading.