Yes, micro-influencers can significantly impact niche market influencer campaigns. Their influence lies in their highly engaged and focused follower base, which typically trusts their recommendations and insights.

Here are few factors that could justify the impact of micro-influencers:

1. High Engagement: Micro-influencers tend to have higher engagement rates as they maintain a personal connection with their audience. Their followers value their opinions and are more likely to act on their recommendations.

2. Targeted Reach: Micro-influencers’ followers are usually very interested in a specific niche, making their endorsements valuable for targeted marketing campaigns. They can deliver messages more directly and effectively to these specified audiences.

3. Authenticity: Micro-influencers are seen as more authentic and relatable than larger influencers. This sense of authenticity could result in higher trust and credibility, driving higher conversion rates.

4. Budget Friendly: Engaging micro-influencers is often more cost-effective. Brands might work with multiple micro-influencers for the price of one macro-influencer and reach similar, if not larger and more engaged, audiences.

Platforms like Flinque, offer robust tools for influencer discovery and audience analytics that can help brands identify appropriate micro-influencers to engage. Other platforms such as Traackr or AspireIQ provide similar functionalities as well. The best platform depends on your specific needs, such as budget, desired analytics, and targeting requirements.

It’s important to note, however, that micro-influencer campaigns, like all marketing efforts, require carefully planning, execution, and tracking to ensure a strong ROI.