In the War Room of the Normandy SV2, Commander Shepard can check the current state of galactic readiness.

While perusing the list, I noticed that I was reciving 25 readiness points from having a high amount of Platinum in Mass Effect 2. How much of each resource do I need to get this bonus? Are there different "tiers" of effectiveness, and is it split across all 4 resources, or is it simply a minimum threshold?