I doubt it did but it could if the app had access to the microphone. Apps to browse content usually try to extract as much data as possible from the phone of the user. I don't believe it goes that far in this case though.

I would guess that Nike just advertises broadly so that there doesn't need to be a trigger. Would fit right into the advertising of Advanced Publications and this may have been a coincidence. Perhaps send any messages containing it? Or it is just a frequency illusion. Do you ever look at ads? Are you sure you haven't ever seen the ad before? Why did your colleague buy the shoes? And who in the world talks about shoes anyway?