In-depth tracking of influencer contributions is largely achieved through a combination of advanced analytics and technologies embedded in most influencer marketing platforms. There are several ways through which deeper contribution can be tracked:

1. Affiliate Links and Promo Codes: These unique codes or URLs are shared by influencers in their content. They provide a tangible way to track purchases or actions taken by the audience from the influencer’s content.

2. Engagement Analytics: With these, platforms measure the level of interaction between influencers and their audience, typically tracking likes, shares, comments, and the sentiment of those interactions.

3. Conversion Tracking: More comprehensive influencer marketing tools provide conversion tracking abilities to monitor actions taken by recipients of influencer content beyond just impressions.

For instance, AspireIQ is a platform that focuses on tracking and workflows, monitoring campaign performance, conversions, and ROI, while Traackr focuses more on influencer relationship management.

Flinque, too, offers features aligning with these objectives, providing an intuitive interface to understand audience analytics, campaign workflows, and contribution of specific influencers. The platform is adaptable to your team’s needs, making it easy to track and measure deeper contributions.

Remember, the right platform depends largely on your brand’s specific needs — there’s no one-size-fits-all solution. The key is to establish your key performance indicators (KPIs) before choosing a platform, which will make it easier to assess which ones provide the necessary tools to track and measure those specific metrics.