I’ve looked into ecosia and they store IPs for a week to “protect ourselves from spammers”. They encrypt your searches, use Bing for results and ads, but they filter the “annoying” ones. I think they are pretty good overall.
Don’t they take search results from bing?
Edit: Correct me if I’m wrong
The biggest problem is that average people are used to the tech big companies provide, and lazy so that they won’t move to overall better alternatives. This means the companies don’t care about consequences of their actions, because there is NONE. Looking at it from the company’s perspective, why not make more money from people that won’t leave the site anyways?
The problem is that nowadays your medical documentation, banking and other sensitive data is all transferred through a computer. And it should be protected and private.