For the month of December and November I've been getting 50% Uber premier, making it cheaper than UberX. I rang to find out how long the promotion was, and was told that the promo code had been applied on my account. I'm not sure that it will work at all for others, but the name suggests it might work if you're a platinum or diamond member on Uber rewards.
Couple of interesting notes:
- Uber loses money on every single trip booked on this code, as their commission of 5-30% doesn't offset your discount
- You get 3x status credits on premier booking, so this is a really quick way to maintain/upgrade status (although the rewards program is pretty weak even at the diamond tier)
- there's a $50 cap on amount saved, however, you can overcome this by breaking up your trip, e.g. for my $200 trip I told the driver to stop and end the trip at the half way mark, and then I just commence a new trip. Because you are in close proximity to the driver (best to agree this with the driver beforehand in case your midpoint is somewhere without many Premiers), your next ride can begin immediately