Got this card on my front doorstep.
I believe you can just create a new account to get this
1) Get the free UberEats app
2) Enter the promo code 66EATS
3) Browse restaurants or cuisines
4) Place order and watch your food come to you
Terms and conditions:
First time Uber Eats users only. Any remaining value is forfeited if total amount of your first order is under $15. Expires 31/8/2020
About 3 years late, RIP