Canada only.
Ends December 25, 2016.
Aeroplan website:
https://www.aeroplan.com
T&C:
100 BONUS MILES OFFER: Member must both subscribe to and confirm that they want to receive Aeroplan Text Messages by texting their Aeroplan Number to short code 27767 from their mobile phone within Canada only between December 1, 2016 and December 25, 2016. One time bonus of 100 Bonus Aeroplan Miles, regardless of how many times a member unsubscribes and re subscribes. If members have previously subscribed, they won't be eligible for this bonus offer. Bonus miles will be credited to the member's account no later than 4 6 weeks after the qualifying activity has been completed. In order to be awarded the bonus miles, members must be subscribed to receive Aeroplan Text Messages at the time of crediting. These miles are not eligible for Aeroplan status. The member is responsible for determining whether their wireless carrier supports text messaging and if their mobile device is capable of receiving text messages. Standard text messaging rates and/or data charges may apply. Check with your carrier plan for your standard messaging fees. For full SMS terms & Conditions, click here.
This promo was on a few years ago as well:
http://www.flyertalk.com/forum/air-c...lan-miles.html