This could be an opportunity for those with the Amex Platinum card to take advantage of the Double Rewards promo, to effectively convert Amex MR points to Aeroplan at a higher rate than normal.

Normally, you could convert 100,000 Amex MR points to 100,000 Aeroplan miles if you wanted to, at no extra cost.

Now, taking advantage of the 115% bonus miles sales, you can buy those 100,000 miles for 0.014CAD per mile, meaning the purchase will cost you 1400 CAD. You can then redeem Amex MR points against this purchase, at a rate of 1000 points : 20 CAD, which means you would need 70,000 Amex MR points to offset the 1400 CAD purchase. Effectively, this means you can convert Amex MR points to Aeroplan miles at a rate of 1:1.4 if you go down this route. I have omitted the sales taxes but you can adjust the numbers as needed depending on your local tax regime.

The downside is that you are losing out on the Travel at Home promo because if you transfer directly MR -> AE, 100% of the transferred miles count towards the milestones, whereas with this route, only 50% of the purchased miles would count (roughly 23k in my example).