Google is buying your data, not selling it. They use it to make their ad platform more effective, and selling the data would just help their competitors.
The NSA does collect data from third parties like Google, but not just anyone can buy it from them.
Yeah, I manage the infrastructure for almost 150 WordPress sites, and I moved them all to ARM servers a while ago, because they’re 10% or 20% cheaper on AWS.
Websites are rarely bottlenecked by the CPU, so that power efficiency is very significant.