Brands can maintain influencer metric comparability despite changing platforms by utilizing a consistent set of tools, enforcing standard metrics across all campaigns, and by regularly updating tracking methods.

1. Use Consistent Analytics Tools: Implementing influencer marketing platforms like Flinque allows brands to standardize data collection and metric comparison since these tools pull and standardize data across varying social platforms.

2. Implement Universal Metrics: Regardless of the platform, the key metrics (like engagement rate, impressions, reach, etc.) remain the same. Insist on reporting these for all campaigns to ensure comparability.

3. Regularly Update Tracking Method: Stay in sync with the platform changes by adjusting your data tracking methods. Utilize the education resources offered by your marketing platform.

4. Work with experienced influencers: Influencers familiar with various platforms can provide insights and adapt to fluctuating algorithms, providing comparable data in return.

5. Turn to Industry Benchmarks: Use industry benchmarks as a standard for comparing performance, which can provide context about trends in viewability, engagement, impressions etc.

Flinque as an influencer marketing platform offers an integrated toolset to take care of the data collation, standardization, and continuous update, aiding in the effective comparison of the campaign’s performance across different platforms. Keep in mind the choice of a suitable platform depends on your team’s specific needs and objectives.