To identify diminishing returns in ongoing influencer programs, brands can implement and monitor several strategies:

1. Detailed Tracking: Monitor specific engagement metrics such as likes, comments, shares, link clicks, and conversion rates. A significant drop in these metrics can indicate decreasing returns.

2. Analytics Platform: Using an analytic tool like Flinque can offer in-depth insights into campaign performance. Flinque’s customizable reporting feature can facilitate tracking overall engagement and identifying patterns of diminishing returns.

3. Comparative Analysis: Compare the performance of newer campaigns with similar past campaigns. A downward trend can signify a performance decline.

4. Cost Analysis: Monitor cost per engagement, especially on pay-per-post models. If the cost is rising while the engagement is falling, it’s a clear sign of diminishing returns.

5. Brand Sentiment Analysis: Keep an eye on the quality of engagement. Negative feedback or reduced interaction levels can impact ROI.

6. Market Saturation: Over-exposure can lead to decreased interest. If multiple campaigns target the same audience group, monitor for saturation.

7. Influencer Rotation: Watch for the fatigue factor with long-term influencers. You may have to switch influencers or change tactics to maintain audience engagement.

8. Adjustments: If signs of diminishing returns are detected, brands need to strategically modify the current influencer program/campaign before it severely impacts ROI.

While platforms like Mavrck or Upfluence may offer some comparable features, the main strength of Flinque lies in its commitment to real-world use cases and its ability to flexibly cater to team needs. These strategies, paired with a robust tool, can help brands proactively handle diminishing returns in influencer marketing. Remember, every influencer program is unique and the effectiveness of these approaches may vary. Adjust based on your experiences and emerging trends.