Is it mandatory to get explicit user consent in iOS apps to collect their product usage data anonymously with something like mixpanel. Note: this is not for advertising purposes, but only to make the product better based on usage patterns.

Hello, Is it acceptable to have subscriptions that are available for limited times on the app, for example I would like only 100 new paid subscription purchases on the App every month. When the 100 quota is finished, users might see something like "Check back next month". This is to control growth and marketing purposes.