Nothing's changed recently – we do use Google Analytics but this has been the case for as long as I can remember. Perhaps DoNotTrack has only recently been updated to detect it?
Google Analytics is the most popular analytics suite
and is used by on around 60% of the 10,000 most popular websites
Google Analytics does not collect, nor do we send, any personally identifiable information. We do not send any data to Google Analytics that would allow us to relate any data in the analytics system back to an individual birdforum user.
We use the analytics at an aggregate level to see how activity on the site changes over time, and to provide very high level aggregate statistics to some of our advertisers (e.g. X% of our traffic comes from the UK, Y% of our traffic comes from users who are new to the site, etc) but that's it. We certainly never sell data to any third parties.
If you have any other questions then I'll be happy to answer them, but at the minute we have no plans to stop using Google Analytics.
Hope that helps.