I don’t think $5/month would stop the biggest offenders: content farms. I have reported dozens of accounts that have posted tens of thousands of tweets in the last few years. Accounts that spam US politicians with things like “I am a democrat and I will not vote for Biden because he is neo-Nazi…” and so on and so forth. Accounts that ruin the discussion, waste attention. Accounts that are obviously not authentic users but are a part of a foreign propaganda campaign. These accounts can afford to pay $5/month.