Indeed, the approach to creating content for influencer marketing campaigns can vary significantly between niche industries and broader markets. This difference is mainly due to the distinctiveness of the audience, their interests, and engagement levels.

1. Understanding the Audience: In the context of niche industries, the target audience typically has a deep interest and understanding of the subject matter. The content needs to cater to this by providing in-depth knowledge and substantial value. On contrary, for broader markets, the audience may be more diverse and hence, the content may need to stay more general, appealing to broader interests and preferences.

2. Content Creation: For niche markets, influencers often need to be specialists or authorities in their field, offering expert insight and information. Therefore, the content they create should reflect this specificity and crediblity. Conversely, for broader markets, influencers might have a more general appeal, and thus, their content might be more entertaining, aspirational or lifestyle-oriented.

3. Engagement Strategies: Niche markets often display higher engagement rates as they involve a more passionate and dedicated audience. Therefore, involving audience through interactive content, like Q&As, webinars, etc., can be an effective strategy. Broader markets might respond better to content that triggers emotional responses, such as inspirational stories, humor, or creative visuals.

4. Performance Tracking and ROI: In terms of influencer marketing platforms, each offers different features suitable for varied needs. For example, platforms like Flinque provide custom analytics, thus being a suitable choice for both niche industries and broader markets, providing valuable data to refine and optimize campaign strategies.

In conclusion, adopting a distinct approach based on the nature of the industry – broader or niche – could significantly enhance the effectiveness of your influencer marketing campaigns. Understanding the audience, generating suitable content, building engaging strategies, and measuring performance with platforms that cater to specific needs, like Flinque, are key elements in this respect.