[mschuster91]

> The IP address is never included in the telemetry data or stored in the database.

It nevertheless is transferred to the origin server (otherwise, how would TCP work), and that is enough for it to be considered under GDPR!

> we felt that by making telemetry opt-in it would bias and limit our telemetry in a way that would make less useful to our users

Well, that still doesn't override the GDPR. The GDPR is law, precisely in the spirit to prevent un-consented tracking!