Check the t & c
For new uberpool members so I assume you can already be a normal uber user.
$30 off a ride till April 21 in melbourne only.
I also saw it advertised on a tramstop poster.
ABOUT
From now until 21 April 2019, if you’re in Melbourne you’ll be able to enjoy up to $30 off your first UberPool ride.
Terms and conditions
To be eligible you must be a new Uber POOL user requesting your first Uber POOL ride, in order to receive up to $30 off your ride (the “Promotion”).
Promotion may only be received once by each new UberPOOL user and will be valid until the date specified in the relevant promotion messaging.
Promotion will apply to the total cost of your first Uber POOL ride on the Uber platform. If your ride costs less than the Promotion, the remaining amount cannot be rolled over.
The Promotion cannot be transferred, duplicated or sold and there is no cash value.
The Promotion is limited to use in Melbourne in locations where UberPool is available only.Valid until midnight, 21 April 2019.
Uber reserves the right to cease or make changes to this promotion at any time, without notice.