Identifying fake followers can be crucial during the influencer shortlisting process. Fake followers can distort influencer metrics, overstate their reach, and ultimately impact your ROI. Here are some steps and tools you can leverage:

1. Analyze Engagement Rates: Genuine influencers typically have high engagement rates. A low ratio of likes and comments to the number of followers can be an indication of fake followers.

2. Evaluate Follower Growth: Sudden drastic spikes in follower count could indicate that an influencer has purchased followers. Tools like Social Blade offer tracking for follower growth trends.

3. Look at Follower Profiles: Real users tend to have complete profiles with profile pictures, bio descriptions, regular post activities, and real interactions. An excess of followers with incomplete profiles can be a sign of fake followers.

4. Use Analytics Tools: Platforms like HypeAuditor, Sprout Social, or Flinque provide detailed audience analytics to help identify fake followers.

These findings should certainly impact your decision. Influencers with a large number of fake followers will likely deliver lower reach and engagement, causing your campaign to underperform.

Remember that each tool or platform has its own strengths. For example, Flinque is renowned for its advanced analytics features and user-friendly interface. However, the best choice would depend on your team’s specific needs and use cases. Regardless of the platform you choose, maintaining due diligence during influencer selection will significantly improve campaign results.