I don't mean to be rude but are you over 45? There is a will with most people under that age in my experience. Or maybe cars are important culturally where you live?
I can't see advertising being part of the long term plan here. He's a payments guy, and there is much more money in turning Twitter into an economy in of itself. This would be tricky if he needed to rely on banks etc, but more recently, he is also a crypto guy. It will be interesting to see how creative he gets in that area, but I would think that his dream would be to create a fluid online economy. I would expect him to first attempt reinventing the concepts of cash, and loose change, but in a digital platform, rather than one's pocket.
I'm pretty sure most of those Reddit clones get flooded with "undesirable" bots as a way of killing them off. The people who currently run bots on Reddit, have massive power over public opinion etc, they want to keep their victims centralised, and on familiar territory.
There was talk of him using crypto currency as a way of disincentivizing bots. Not sure how well thought out the ideas were, but there might well be some interesting integrations with crypto on the platform
I think we need to expand our vocabulary a little on this subject. A lot of people seem to think that these "bots" are just limited to "buy crypto today" type posters.
What they don't realise is that the comment they are reading right now could well have been written by a bot.