Geht leider nicht überall. Manche lassen "+" nicht als char im E-Mail Feld zu. Man kann aber willkürlich Punkte hinzufügen, sollte es nicht mit "+" funktionieren. "" ist also identisch mit "".
Gut sind auch Wegwerfemaildienste wie https://getnada.com/
Also other places with birthday rewards include Habit burger which gives out free charburgers, Amc stubs gives you a large popcorn, and harkins theaters gives out $5 discount off anything. No one at any of these places actually checks if its your real birthday or not, so I use these things constantly. I like use getnada.com for throwaway emails.
go to getnada.com you don't need to sign up. If assigns a random inbox to your ip address however when you clear your cookies it will give you a new inbox. 99% of the time the fake email works.
Just enter random values. The phone number is optional anyway. For the email, use getnada.com Basically any [email protected]. Open the link and find your way to the required email inbox.