I'm pretty much in the dark when it comes to BAT rewards too so not much help I'm afraid. Unlike you though I am able to earn a little from advertising but, having done that, I now have no clue what to do with the tokens. Actually I don't even know if the ad rewards are tokens or something else. It's on my very long list of things to look into and get my head around.

Hopefully someone will be able to help you at least start earning rewards. 

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