anonymous = without the name
To be fair, this is probably just a bad translation / bad phrasing.
I expect what they mean by this is “to continue without signing up”
It’s a pretty common pattern on ecommerce sites. You can sign in with an account, or you can make a one-time purchase without an account.
And of course if you don’t have an account they still need somewhere to send the confirmation (and in this case, probably send the tickets)
Well they have to send the tickets somewhere, don’t they?
Probably I should have made clear this is an app. I just expected the ticket will remain in the app.
Ah, that makes sense then.
The reality is they probably used one of the frameworks to generate both the app and mobile website from the same code because it’s easier. So it’s not taking advantage of the fact it’s actually installed on a phone.