Concerns Around Attribution Integrity in MEDVi Campaigns

Introduction

This investigation examines attribution practices within MEDVi marketing campaigns, focusing on how tracking parameters behave throughout the customer journey.

The analysis is based on direct observation of funnel behavior, including URL transitions, parameter handling, and interaction flows from initial landing through checkout progression.

The goal of this report is not to assign intent, but to document observable behaviors and contribute to broader discussions around attribution transparency in affiliate marketing.

Key Finding 1: Attribution Override via affid=org

During navigation through MEDVi's funnel, inbound affiliate parameters do not consistently persist. Instead, they are replaced with an internal parameter (affid=org) at specific stages of the journey.

// Initial affiliate link
https://medvi.com/offer?affid=partner123&sub=campaign1

// After navigation or redirect
https://medvi.com/checkout?affid=org&ref=internal

This behavior indicates that the original referral source may not be preserved throughout the session, resulting in potential reclassification of traffic origin.

Key Finding 2: Email Funnel Interception

Within the funnel, users are prompted to submit their email address before completing checkout. Following this step, automated emails are triggered containing links to resume the purchase process.

These email links include internal tracking parameters rather than the original affiliate identifiers.

If users return via these links instead of continuing their initial session, attribution may shift to an internal email channel rather than the original referring source. This creates a scenario where affiliates who drove the initial interest may not receive credit for the conversion.

Key Finding 3: Parameter Stripping

Across multiple stages of the user journey, URL parameters are modified or removed. This includes transitions such as:

• Landing page to product or checkout pages
• Cart interactions
• Account creation or login flows
• Payment-related redirects

// Initial URL
?affid=partner123&click_id=abc123&sub=test

// Later stage URL
?session=xyz789&src=web

In these cases, affiliate identifiers are no longer present, which may impact attribution continuity.

Key Finding 4: Post-Click Attribution Changes

Observed behavior suggests that attribution parameters can be modified after initial engagement, including during:

• Interaction with on-site elements (e.g., banners or buttons)
• Engagement with chat or support features
• Navigation between internal pages

This introduces uncertainty in attribution consistency, particularly where last-click attribution models are expected to remain stable.

Key Finding 5: Lack of Transparency

There is limited publicly available information detailing how attribution is handled within the MEDVi funnel, including:

• Parameter prioritization rules
• Email attribution handling
• Internal tracking overrides

This lack of clarity makes it difficult for affiliates to fully understand how conversions are attributed within the system.

Industry Impact

The observed patterns have broader implications for performance marketing:

ROI Distortion

When attribution shifts away from the originating traffic source, performance data may not accurately reflect campaign effectiveness.

Unreliable Scaling

Inconsistent attribution can make it difficult to identify high-performing channels, increasing risk when scaling campaigns.

Reduced Trust in Tracking Systems

Clear and consistent attribution is essential for affiliate partnerships. When attribution behavior is unclear, confidence in tracking systems may decline.

Conclusion

This investigation documents observable patterns in how attribution is handled within MEDVi campaign infrastructure.

While technical behavior alone does not indicate intent, the consistency of these patterns suggests structured implementation decisions that influence how traffic sources are recorded.

This highlights the importance of:

• Preserving inbound affiliate parameters
• Aligning email flows with attribution models
• Providing clear documentation for partners
• Maintaining transparency in tracking behavior

Accurate attribution is fundamental to a sustainable affiliate ecosystem. Ensuring clarity in how traffic is tracked and credited benefits both advertisers and partners.