4 License tiers with increasingly better perks for each step up. The 3 names for each tier is to account for your desired naming convention of either ranks, metals, or descriptives.
Cadet/Bronze/Economy License
$5 per month
+50% Credits, Synergy
+1 Loot Search
Pilot/Silver/Standard License
$10 per month
+50% Credits, Synergy, Loyalty, Research
+2 Loot Search
x2 to Daily Monocrystal rewards
Ace/Gold/Premium License
$15 per month
+75% Credits, Synergy, Loyalty, Research
+3 Loot Search
x2 to Daily Monocrystal rewards
Fragments of Beryllium, Neodium, and Xenocrystals replace credit drops found commonly in loot search (10 fragments combine to make 1 ore)
Veteran/Iridium/Luxury License
$20 per month
2x Credits, Synergy, Loyalty, Research
+4 Loot Search,
x3 to Daily Monocrystal rewards
Fragments of Beryllium, Neodium, Xenocrystals, and Monocrystals replace credit drops found commonly in loot search (10 fragments combine to make 1 ore)
50% Discount on Iridium Lab Extractions (Or alternatively, 2x yield, but same cost)