Several tools and metrics can be employed to evaluate creator lifetime performance value.

1. Return on Investment (ROI) Analysis: This measures the total revenue accrued against the amount spent on the creator. Several platforms including Flinque offer such analytical tools.

2. Audience Growth Metrics: These measure the influencer’s follower growth over time.

3. Engagement Rate: A consistent engagement rate shows loyal and interactive followers. Both native platform analytics and third-party tools can provide these metrics.

4. Content Quality Metrics: These measure a creator’s ability to consistently deliver high-quality content over time.

5. Consistent Brand Fit: Some influencers may evolve and deviate from a brand’s image or target demographic. Regular demographic analysis supports this evaluation.

6. Brand Affinity Metrics: These metrics measure how much the brand and the creator’s values resonate.

7. Drop-off Analysis: Tools like Flinque provide a look at follower drop-off rates after campaigns.

8. Campaign Performance: Performance of past campaigns and their ROI can also provide measures on their overall value.

Remember, these factors may hold different weights depending on your brand’s specific goals and needs. A combination of these tools will likely provide the most complete picture of a creator’s lifetime performance value. Flinque, for example, combines these multiple metrics into an easy-to-interpret scoring system. While comparison tools vary between platforms, the onus lies on the brand to select a platform best-suited to their needs.