Final answer:
Azure DevOps allows for an unlimited number of stakeholders to join an account for free, where they can submit feedback and track progress.
Step-by-step explanation:
The question you're asking pertains to Azure DevOps and involves the management of application lifecycle within a team or company. Specifically, you're interested in the number of stakeholders that can join an Azure DevOps account without incurring additional charges. In Azure DevOps, unlimited stakeholders can be added to an account at no cost. Stakeholders have restricted access but can provide feedback, and track project and work item progress.