Alright all, so here's at least part of the answer: the original message is sent because they legally have to as members of the CCTS. See here: https://www.ccts-cprst.ca/documents/public-awarenessPoint number 3.f states:SpoilerParticipating service p...
@ShawnC13 I doubt there is anything so sinister going on here. Perhaps Telus simply uses the same broadcast system when sending out external communications to customers of other providers (for whatever reasons and with whatever content, be it spam or...
I got this message as well. Out of curiosity I replied to it. It said it could not understand my response, and prompted me to text "MORE". I sent that, and what I got back was....an ad for Koodo?! The exact text was:SpoilerSwitch to Koodo on the ex...