May be worth mentioning that it's not every Friday that this happens. I was under the impression that it was, and would have accidentally made a purchase on a random Friday if I had not looked further into it because I wanted to check which time zone was used for the cutoff.
What keyboard do you use? Do you need something like Unexpected Keyboard, or are you still able to be productive in vim with a more "standard" Android keyboard?
You don't have to use a "classic email server", or even link your account to your current email address at all. The default onboarding procedure actually creates a new anonymous account for you on the default chatmail server. Reading through the site, I can't actually even tell why someone would want to use their preexisting email address.
Me when I realize the more I use Termux, the better I get at using Debian