As a Product Owner, you are accountable for maximizing the value of the product and the work of the Scrum Team. To do this, you need to have a clear understanding of the product vision, the product value, and the product backlog management. Measuring feature usage is one way to gather empirical evidence of the value delivered by the product and the feedback from the customers and users. This data can help you validate or invalidate your assumptions, prioritize the product backlog items, and inspect and adapt the product strategy.
Therefore, measuring feature usage is not a waste of time, but a valuable practice for agile product management.
Moreover, as a Product Owner, you are also responsible for engaging with the stakeholders and customers, and providing them with transparency and openness. This means that you should share the data and the insights you gain from it with them, and invite them to collaborate with you and the Scrum Team. This can help you build trust and alignment, and foster a culture of experimentation and learning. Therefore, you should not hide the data or stop measuring it, but rather use it as a basis for constructive dialogue and decision making.
Professional Scrum Product Owner™ II Certification
Managing Products with Agility
Evidence-Based Management

Explanation
According to the PSPO II resources, a product owner should optimize the value of the product and the work of the Scrum Team1. One way to do this is to improve the value experienced by the customer, which is the perception and evaluation of the product by the customer2. A price increase can be justified if the customer perceives that the product delivers more value than the cost3. This can be achieved by enhancing the product quality, functionality, usability, or design, or by providing additional benefits or services to the customer4. The other options are not effective ways to justify a price increase, as they may either reduce the value experienced by the customer, or increase the cost without increasing the value. References:
* 1: The Scrum Guide
* 2: User Experience
* 3: Value-Based Pricing
* 4: 8 Techniques to Justify a Price Increase
* : Justification for a Price Increase: Positioning For Success