Your network partner may display fewer targeted users than your Singular Audiences page. This is because your partner can only target the portion of your audience that is part of their user base.
For example, you set up a segment that targets 1000 users and distribute it to Vungle. Of those 1000 users, 900 are part of Vungle’s user base. Therefore, Vungle might show you 900 targeted users.