Chrome's CORB algorithm seems to be fickle.  For some reason it doesn't block a JSON response when I use the getOffer method, which is practically the same thing as the JSON response when using the Measure by click element.Chrome:FireFox:

Chrome definitely blocks the response from a Measure by click (yet to test getOffer/applyOffer), whether that affects the Target test analytics I'll be testing.Chrome, no response from the click request:FireFox (and Safari) don't block the JSON response: