Interesting article. Depends on the individual but most people do this.
"The agency pushed these influencers on to the client on the basis of numbers (followers or views) that could all (too easily) be rigged. Clients were so thrilled with the idea of social media marketing that they never bothered to see whether the people these influencers reached (even assuming they did reach the number of people they claimed to) were relevant to the marketing of their product.
PR companies got rich. ‘Influencers’ found great gigs. And because there was no way of measuring the commercial impact of a social media post, no one was ever called out."