Given the recent article by CNN [https://www.cnn.com/2021/05/04/tech/pimeyes-facial-recognition/index.html] I had a look at their privacy policy and found this interesting tidbit:

Data of unidentified entities are stored for 2 years.

This seems "alarming" as searches can be used to find images that they _haven't_ yet indexed.

https://pimeyes.com/en/privacy-policy