This is probably old news to most of you but I didn't realise until I tried to delete them yesterday.
Tokens rank up House Of Judgment Reputation. Not a great deal but I have quite a few of them so when I'm close to fully ranking up, they are useful.
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I used to delete them as soon as I got them for 10 points so now I only have about 20. My GF kept all hers and now she has hundreds that can be used for 60. FML. At least I have about 50 weapon cores left that can be used for 100 points.