How it works is it gives u a chance at getting 2 per pick up with an increased chance at getting what I call the super chest. That's where u get 8-11 of of the mats with about 250 glimmer and some ammo packs

I get 2 helium most of the time and on rare occasions i get 8 helium a bunch of glimmer and 2 blue weapons or armor from a single chest.. iv even gotten 12 helium once before from a single chest...

I've noticed on occasion where I would get two material items from one spot. Guess it just unlocks the possibility of it happening instead of making it happen.

It's either a percentage for a chance at more material, or the system is broken. When I look at the "nearest bonus" section I've surpassed all of them by a few thousand. I'm not sure if it's just me(and a bit of bad luck), but I really don't notice a difference.

I see the "closest Bonus to Completion" on bungie.net but I am curious as to what other bonuses are available and what I have completed already to Max so I can grind something else.

Update After spending the last hour doing chest runs in Archer's Line on the Moon, I think I have figured out that the bonus is actually an added percentage chance to find additional resources from nodes. At first it seemed about 5% (I got two in my first 40 nodes or so) but as I continued that number came closer to 20% of the time. Now I am not sure if I was just having bad luck early on or if it actually raises over time; if it does it could be based on the number of enemies you kill, chests you open, or resource nodes you harvest I am not quite sure. I will say that using this method you can probably snag about 22 marks an hour; you will encounter a public event worth 4 vanguard marks every 20 minutes or so, and can probably harvest about a 100 materials which can then be exchanged in intervals of 50 for either 5 vanguard or crucible marks. The rewards for the public event seem to be the best part of this since I snagged 3 ascendant shards as well as a few blue engrams. It's also worth noting that out of around 20 chests one of them had a blue engram, 2 special ammo synthesis, and 11 helium filaments and another contained a rare ship design; so chests can randomly have big rewards as well. Hope that helps clear up the bonuses a bit more, it's just too bad that it isn't a 100% bonus...

have you tried completing the third rank?

I am interested in figuring this out too... Legendary equipment requires requires 90 standard materials and 18 ascendant materials to max out; and it seems as though materials like helium filaments (which I currently need 162 of) are far and few on the moon; getting that resource bonus to work would cut the work in half at least...