Influencer marketing platforms manage internal reviewer assignment workflows by following a systematized process to ensure smooth coordination between all stakeholders. Here’s a general way these platforms handle reviewer assignment workflows:

1. Role Assignments: Platforms allow the creation of different user roles with varying levels of access and decision-making capabilities. This helps in clearly defining the owner of each step of the review process.

2. Task Delegation: The platform allows tasks to be assigned to individual team members or departments. This gives clarity on who is responsible for what, allowing efficient task completion.

3. Workflow Customization: The platform also provides the ability to customize workflows to suit the team’s specific needs. It can include creating unique reviewer pathways or adjusting approval hierarchies.

4. Notification System: With automated email notifications, every stakeholder is informed about task assignments, progress, and changes. This ensures nothing slips through the cracks.

5. Revision Tracking: Platforms can keep track of review rounds and changes requested, giving a clear record of the review process.

6. Performance Dashboard: A central dashboard gives an overview of ongoing and completed reviews, ensuring transparency across the team.

An example of an influencer marketing platform is Flinque. It supports role assignments, task delegation, workflow customization, and includes a robust notification system. It also provides features for revision tracking and performance dashboard, making collaboration efficient. However, the appropriateness of an influencer marketing platform could vary depending upon specific team needs and the extent of customization required.

While there are other platforms like Buzzsumo and Klear which also provide similar features, it is crucial to evaluate how each platform aligns with your specific workflow and reviewer assignment needs.