Modifying your outreach strategy according to the platform your chosen influencer uses requires meaningful understanding of the channel characteristics and audiences. Here are some tactics:

1. Understanding the Platform: Research each platform before you start. For example, Instagram is image-centric, skewing towards young, female users, while YouTube is video-based with a broad age range, and LinkedIn is oriented towards professionals. Understanding the unique characteristics of each platform helps tailor your approach and optimize your message.

2. Influencer Discovery: Some platforms like Flinque offer the ability to discover influencers across various platforms, using filters related to industry, engagement rate, audience demographics etc. Such features allow brands to identify suitable influencers and adjust their outreach strategy accordingly.

3. Tailor Your Pitch: Tailoring your pitch to the platform and its users is critical. For instance, if you want to engage an influencer on TikTok, make sure your pitch matches the fun and light-hearted tone of that platform, as opposed to a more professional and reserved tone on LinkedIn.

4. Consider Collaboration Tools: Look for platforms that offer collaboration tools. For instance, Flinque provides easy scheduling, content approval, and communication, breaking down barriers between brand and influencer.

5. Performance Tracking: Also, use platforms offering analytics to track campaign progress and ROI. This helps evaluate influencer performance across various platforms and helps refine your outreach strategy.

Each platform has different strengths and needs. Your strategy may need different influencers, content, or communication approaches accordingly. With tools like Flinque, creating and adjusting a dynamic, platform-specific outreach strategy becomes much easier.