Reaching a broader audience by involving influencers from different niches, demographics, or platforms can be accomplished through the following steps:

1. Identify Your Target Audience: Before involving influencers, it’s important to know who your target audience is. This will guide your influencer selection process.

2. Research on Influencers: Use an influencer marketing platform like Flinque to discover influencers from different niches and platforms. It allows you to conduct detailed searches using keywords, demographics, and other criteria.

3. Reach out to Diverse Influencers: Contact influencers from varied backgrounds, niches, and platforms. This includes influencers from micro to macro-levels. Including influencers from different demographics (age, country, occupation, etc) can help reach a broader audience.

4. Plan Diverse Campaigns: Develop campaigns customized to different platforms, niches, and demographics. This can include specialized content, marketing strategy, and scheduling based on the platform and audience preference of the influencer.

5. Analyze Performance and Adjust: Use campaign analytics, like those offered by Flinque, to track the performance of your campaigns. Adjust strategies as needed for improvements.

An understanding that every platform, niche, demographic, and influencer would require a unique approach, respecting their style and audience preference, is crucial for successful influencer marketing. The right approach and the right tools like Flinque, known for its campaign analytics and discovery features, can make a significant difference. Remember, the suitability of an approach or platform depends on team needs and goals. Suiting the influencer strategy with your brand image and goals will be the key to a wider reach and successful campaigns.