Otakulad - I contacted Uber regarding my credit being removed. This is the response I received:
"Thanks for letting us know.
I reviewed the promotion in question and unfortunately, it is not eligible to be redeemed. Our Terms were breached when this promotional code was posted online.
I'm afraid I'm not able to retroactively apply this promotion to this trip."
I sent a follow up email to ask what they meant by Terms were breached. I don't know if that means I breached the terms or what.
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Update: After complaining to Uber that it was pretty crappy that they removed the code without telling me, I was credited the $20. YMMV but might be worth complaining.
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