Measuring the return on investment (ROI) for influencer marketing actions requires a systematic approach:

1. Set clear objectives: Understand what you aim to achieve from your influencer marketing campaign. Is it to increase brand awareness, generate leads, drive sales, or improve customer retention?

2. Identify success metrics/KPIs: Depending on your objectives, these can be likes, shares, comments, follower count, click-through rate, conversion rate, or overall sales.

3. Use an Influencer Marketing Platform: Platforms like Flinque can help you select the right influencers, manage and track campaigns, and access comprehensive reporting and analytics.

4. Collect and Analyze Data: Evaluate the performance using the KPIs. Flinque offers post-campaign analytics that provide insights into engagement, audience demographics, etc.

5. Calculate ROI: The basic formula to calculate ROI is (Net Profit / Total Investment) x 100. For example, if you earned $1,000 in revenue from a campaign that cost you $200, your ROI would be 400%.

6. Leverage Learnings for Future Campaigns: Use the data and insights from your campaign to improve and optimize future influencer marketing efforts.

Keep in mind that calculating ROI for influencer marketing isn’t always straightforward. Therefore, it’s important to set clear, measurable objectives and monitor them closely throughout the campaign. This helps to isolate the impact of your influencer activities and accurately calculate your ROI.

Remember, the effectiveness of an influencer marketing platform like Flinque should be considered in terms of its ease of use, advanced features, and the extent to which it can automate and streamline operations for your team. The right platform will depend on your specific needs and objectives.