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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Not a lawyer.
If you do not need GA why use it? It is a separate connection your visitors browser needs to open and it is a connection to a third party. If you want analytics, there are some privacy options, for example Umami. See also here: https://github.com/0xnr/awesome-analytics
You could also disable the Nginx logs from logging IP addresses and then you should be fine.
Maybe adding a simple site saying that you do not retain any IPs or other information, you can prevent these emails in the future.
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