Great offer on waiving off the fee. I'm a privacy nut, and though I realize you're doing this for publicity (at least on Twitter), I would prefer a method that'

Great offer on waiving off the fee. I'm a privacy nut, and though I realize you're doing this for publicity (at least on Twitter), I would prefer a method that's directly done on your platform. Perhaps something like a code or something that one could enter in the bio or elsewhere would be nice.