More than the number of followers, brands are looking for influencers to work with and who have active followers. Some influencers, for example, offer a page on their websites where followers can donate money to the influencer. It's always good to have a lot of followers on Instagram, because brands are attracted to users or influencers with a large follower base. Finding the ideal influencer for your brand requires a delicate balance between your budget and influencers' prices.
While the influencer marketing industry has a large number of celebrities, most of these people will need additional employment. For example, a travel influencer could earn money by planning a trip for a handful of followers. Schedule publications, research and interact with influencers in your industry, and measure the success of your campaigns. An example could be an influencer who shares information about frugal living and economic tricks, but then shares a sponsored post of an expensive product that their audience is unlikely to buy.
On the other hand, influential people have the right to set their own price and, for the most part, their positions are outside these guidelines. Affiliate marketing is when influencers share a link to a product and then receive a percentage of the sale if a follower buys an item from that link. But, again, influencers make money by sharing articles, so make sure that what they're promoting is something that fits their brand. If an influencer usually recommends the same shampoo, they're likely to use it and support the brand.
Likewise, you could be an influencer who talks about clean eating and healthy living, but then sharing a sponsored post for a junk food brand. While analyzing ROI is useful when deciding if you want to continue working with an influencer or not, most of the time you'll have to decide whether or not to hire an influencer first.