A person with a million Instagram followers can get £3,000 per post

"“It’s the Kardashians who have trail-blazed, really. Everything they do is monetised,” Nicholls says, referring to the “royal family” of the reality television/social media kingdom. The result is a steady and largely effortless stream of cash for those with enough online “disciples”, as he calls them. A person with a million Instagram followers can get £3,000 per post, he explains, and another £2,000 to wear an outfit to an event. “Very quickly you’ve earned £5,000 just by going out,” he says.
Make-up bloggers Nic and Sam Chapman at a beauty and fashion festival in New York © Getty
The prices rocket as the number of followers increases. According to Captiv8, a US social media analytics company, payment for posts on Instagram can range from $800 for people with fewer than 250,000 followers up to $150,000 for those with 7m or more. The rates for Snapchat posts are broadly similar, Facebook carries a moderate premium and YouTube is the most expensive of all, with 7m or more followers resulting in an average fee of $300,000. And that is before you count the other branding opportunities available to social media celebrities. The new and old worlds are effectively one and the same, with fame in one spilling into the other."
Source:  FT, 4th May 2017