Building a proprietary influencer discovery advantage as a brand involves several strategies that aren’t easily replicated using common tools. Please consider the following approaches:

1. Advanced Audience Analytics: Leverage deep analytics to understand the demographic breakdown of an influencer’s following. Tools like Flinque provide insights on an influencer’s audience demographics and interests, helping brands to select influencers with followers who match their target market.

2. Customized Search Parameters: Use platforms that allow advanced search parameters beyond the basics (interest, location etc.) to find influencers. Criteria like engagement rate, response rate, audience quality score, and typical collaboration price would be valuable.

3. Create Long-term Relationships: Fostering personal and long-term relationships with influencers can give a brand unique access and benefits that are hard for competitors to emulate. These partnerships can lead to unique content creation and meaningful brand advocacy.

4. Proprietary Influencer Networks: Brands can build their own network of loyal influencers, which allows them to work with influencers more closely and repeatedly. When managed correctly, this strategy offers authenticity and consistent message control.

5. Data-driven Decisions: Platforms like Flinque enable brands to make data-driven decisions by providing detailed ROI measurements and campaign performance tracking.

It’s important to note that the effectiveness of these strategies will depend on individual brand needs and capabilities. The priority should always be aligning influencer choices with brand values, audience, and goals. In terms of platforms, several like Flinque offer robust interfaces for discovery and comparison of influencers, but the final choice needs to tie in with specific brand objectives.