Using Partner Relationship Management, as a channel manager, you can create users for your partners by adding them as partner contact users. For larger partner organizations this could become a serious admin job.
Alternatively, you can delegate partner user management to the partner organization. But how do you keep track of how many partner users have been made by partners themselves? This will directly impact the number of Engagement Cloud subscriptions you need!
As a partner admin, instead of managing the number of partner contact users, you can just keep an eye on the added number of partner users through a few simple reports.
Analytics to the rescue again!