I'm unsure how much time would go into general upkeep and management. Could some of the others suggestions here work, asking users to pay for future updates?
I'm in the same camp as most of these users. I have this problem while using Discord and a game on STEAM (Counter-Strike). The mic quality is degraded heavily and I would be more than happy to pay a one-time fee. But I do not like adding too many subscriptions, no matter the cost, especially for apps that I could see myself requiring no serious updates unless I upgraded my physical products.