No one will pay money for Steem if it is only used to promote stuff on Steem, The only reasons bidbots were around for so long was because it took about a year to convince a majority of witnesses that if something wasn't done about the issue, the platform would die.
It's like saying people will pay money to browse ebay or amazon or to look at online ads. You need to attract good content creators and advertising before that happens isn't how todo it. It could work in the future with an SMT, but this is very doubtful. None of the content creators are going to want that.
If we have a chain split and 1 chain allows bid bots while the other doesn't we will be able to test your theory in practice.
The bid bot chain will fail hard and fast.