Got this one in an email this morning. Assuming it's targeted.
Terms and conditions: Intended users only. Promo code must be entered into the Uber app. Maximum promotional value of up to $10 will apply on 3 rides before 13 September 2019 AEST. If your ride costs less than the promotional value, the remaining amount cannot be rolled over. Offer not valid on Uber Eats. Promotion is non-transferable and does not apply to cancellation or wait time fees, tolls or additional seats. This offer cannot be used in conjunction with any other promotional offer.
no email, but worked for me .. cheers