It was a program that you linked your twitter, facebook, or instagram and by following properties, liking, or hashtaging certain tags would issue you 25,50, or 250 points. There were several changes during the beta program such as changing the points issued, properties that would issue points ect. It ran for several months and I believe I got almost 12k points by the end.
As for the later product, they are running the promotion with Twitter where hashtaging certain tags along with #MRpoints will issue you points. Some tags are temporary or have a max.
I don't think it went to production. Too bad. I found it an interesting way to track social activity and get a few extra points here and there. No different than the badges on your profile now - though those were not retroactive, making a lot of us long time LTPs upset as we got it the old way (no rollover, 1,000+ nights) and our badges don't recognize that status and achievement).