User Moto Guy @ XDA swears that I am part of a Nougat soak test I never join or have any knowledge even existed.
If you did not fill out the survey, get a confirmation email, and agree to the NDA, you are not part of the soak test.
Motorola could have incorrectly added your IMEI/SN to the soak test, or if some other weird situation like you bought the phone used recently and the previous owner had signed up for MFN soak test it would explain it... Most likely, this is a limited roll out. Google and Moto use(d) a similar scheme of 1%, 5%, 10%, etc in a phased roll-out plan to try to catch possible issues, it is possible we are in the early stages of that type of release and you were just lucky.
People on XDA get real excited and b*tchy about releases when others get them and they don't. I wouldn't let it bother you.