Simple. Once you get the first tier active for the set the perk makes you a magnet to nearby motes, allowing the collector to not have to compete with non collectors for motes or having to run over the same motes 5times before they pickup.
Thoughts?
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I wouldn't mind a short range magnet. Maybe a 1 to 1.5 meter range of pickup? Anymore and you might step on my toes when I'm trying to get 1 or 2 more motes to send a blocker, and I'm not protecting you from an invader past that point. I swear, those motes have grease on them or something. I'll run to pick it up, do a 180, look back, it's still on the ground.