Ecosia adds "contractually forced" Microsoft Clarity tracking (https://learn.microsoft.com/en-us/clarity/setup-and-installation/about-clarity | privacy faq : https://learn.microsoft.com/en-us/clarity/faq#privacy), which will record the behaviour of users on the website. Recording clics, size, and more.

They will also add an optional Google setting. Enabling the cookie will allow to get search results from Google, but also to get tracked by Google.

Optional Microsoft advertising tracking is still a thing, tho it may not be necessary if Bing can get a fingerprint and behaviour of the user in real time...

This may be the final flow for Ecosia for me. Unless somehow the Microsoft Clarity can be private... But I don't think so.