Iirc the idea behind brave is to create a sustainable alternative to the ad/data collection of big tech. They use blockchain to enable microtransactions for content.
I don't have numbers but generally, compared to smaller turbines, a larger blade length means a faster blade tip to maintain the same rotational frequency (the end of the blade will be going faster around the turbines circumference). This creates more noise, and noise is a HUGE limiting factor, so they increase the turbine's torque to get more power from slower rotations. That means a larger, more complex, and more expensive generator in upfront and maintenance cost.
"Google's lawyer, Robert van Nest, asked Schwartz whether, during his tenure at Sun, Java APIs were considered proprietary or protected by Sun."
"'No,' Schwartz said in explaining the nature of open software. 'These are open APIs, and we wanted to bring in more people...we wanted to build the biggest tent and invite as many people as possible.'"