I think the privacy crowd drawn to Brave couldn't care less what the (current) digital advertising industry wants. Anyone who's been involved in the current ad-tech industry knows it's a total tire fire of fraud, technical incompetence and deep hostility to end-users. Brave's model is very interesting and also a threat to the current ad-tech cesspool, so there should be no surprise to see attempts to misinform people…
Microtransactions have been tried many times. I spent half a million testing it. Didn't work because of user behavior. And unless users are buying with their own money, it's just converting the BAT they earn from ads into BAT they pay the publisher. This is an ad network.
Even the block-and-replace-ads model has been tried before. Everything from iframes to browser toolbars. Again, this is an ad network.
If you have to use language like "economic layer" to describe your business model, you're either hiding something or you don't have one. Or we can just use the standard definition: brave is a browser-based ad network.