I think the standard for "strictly necessary" is whether that piece of data is necessary to provide the requested functionality. Does submitting an order form

I think the standard for "strictly necessary" is whether that piece of data is necessary to provide the requested functionality. Does submitting an order form for some goods in any way depend on the telemetry requests you sent before/after? Would the order still go through if those requests were missing or fed fake data? If the answer to the above is true then "strictly necessary" would be difficult to apply. Of course the point is moot because so far GDPR enforcement is not only lacking to begin with but the cases that are investigated aren't given the right technical expertise to adequately determine those answers.