Connecting influencer exposure to downstream conversions can be a little tricky due to its indirect nature. However, reliable strategies include:

1. Attribution Tags or Links: Brands often provide influencers with unique codes or links for promoting their products or services. This allows tracking of any resultant sales or conversions directly back to the influencer’s promotion.

2. Promo Codes: Customized promo codes are not only trackable but also incentivize purchases ensuring a likely conversion from exposure.

3. UTM Parameters: These are tags added to URLs, useful for tracking the success of digital marketing campaigns across traffic sources and publishing media.

4. Advanced Analytics: Sophisticated influencer marketing platforms like [Flinque](https://www.flinque.com) provide in-depth analytics enabling brands to analyze the performance of each influencer based on various metrics, thus determining their effectiveness.

5. Pixel Tracking: This involves placing a pixel on the conversion page (like a thank you or order confirmation page) to track the conversions.

Remember that the suitability of these methods depends on your specific needs and desired outcomes of the influencer marketing campaign. It’s always beneficial to use a combination of approaches for diversified data and comprehensive insight.

In comparison to other platforms, Flinque offers a robust set of analytics and tracking capabilities, thus assisting brands in closing the loop between exposure and conversions. This comprehensive approach helps brands make informed decisions about their influencer marketing campaigns. Always remember to track, measure, iterate and optimize your strategy for the best ROI.