I understand you were mostly making an incentives point and there I think we just disagree.
Here's what I expect to happen:
1) First, Twitter introduces paid verification. They cut back on their content moderation efforts on unverified accounts, but they exercise more control of spam and scams on verified accounts, including permabans (which are easier to enforce, due to better knowledge of the people behind the accounts—a credit card number, at the very least).
2) Next, they introduce an option to hide all non-verified tweets, other than from people you follow. People will use it because non-verified tweets have a much higher proportion of spam and scams.
3) At this point, they've successfully price discriminated between professional content creators (such as myself) and consumers / casual creators. I expect additional price discrimination to follow, such as charging for API access in order to target people using tools such as HootSuite to manage large fanbases.
All of this is predicated on people adopting #1, which is why it's important for Musk to find the right price point. It looks like he's just spraying out ideas, but I think he's doing price research.
But we'll see! My own speculation is that they lean more into trying to convince ordinary users (or content creators like you) to get more into the advertising game to replace some brands that may leave. Think of dating apps and features like Super Likes, Boosts, etc. Tinder and others figured out how to get money out of regular folks without a traditional ads interface. If I were them, I'd hire folks from Match Group.
Frankly, I'd rather see an ad for a random content creator than for some of the weird brands that advertise to me. Right now the top "Who to follow" for me is Lamps Plus, "the nation's largest lighting retailer." As you could imagine, I'm not interested. Instead, they could give everyone a free 30-min account boost and give their premium Blue members four or five more a month.