Hopefully this is in the right place. IDK if this is known or not but I stumbled upon a way to double the usual 150 DMR points to 300 per movie.
Note: I have my DMA accounts linked to Amazon and most of the other platforms available.
As an example I will use the movie Frozen.
Basically I redeemed my code for Frozen at digitalcopyplus or the site on the slip (not on disney movies anywhere.) Once I was given the options of platforms to redeem I chose Amazon first, do not select Disney Movies Anywhere. I was given an Amazon Digital Promo code to redeem on Amazon which was loaded to my Amazon account. At this point I logged into my DMA app and entered the code for Frozen which gave me 150 points.
I then went to Amazon and searched for the movie Frozen and I selected "Purchase HD for $17.99" which applied my Amazon digital promo code and gave me another 150 points.
I first noticed this back when DMA linked to all the platforms over a year ago. Before then I would redeem on Amazon first then say it didn't work and I would redeem on iTunes also. Once they linked all of them I got 150 points for each of the movies I did that with on Amazon. I just picked up Robin Hood and The Sword in the Stone from Best Buy and I received a total of 600 points using this method.
Please delete if this is a known exploit I searched but I wasn't sure what terms to search.