I'd prefer to see them spending time on polishing their mobile app, which lacks in UX in important areas. For instance offline access to received, but yet unopened emails simply doesn't work. There is a (mis)feature where email bodies are downloaded only on notification, but in my case emails remain unavailable offline and Protonmail support was unhelpful. But even if email-via-notification worked, it is still pretty…
But I guess there just is not enough demand for that.