Hmmm I disagree.
People who pay are funding the development of Damus.
People who do not pay are getting the results of that development for free.
Everyone is benefitting.
So I think the arrangement is fair.
Twitter is different & I agree that Twitter is a caste system and an abomination. Twitter boosts visibility based on how much ppl pay. So if you can't afford to pay your voice is worth less. Awful.
Nostr development needs to be sustainable as a business. Aside from donations and merch sales that leaves advertizing and subscriptions. Each has it's pros and cons.