Off-topic, tried to sign up on mobile - some strange auto scroll meant I couldn’t get past filling in my name! Happy to provide more info if you can’t repro.
That's kinda weird, I will tell you that signups are kinda limited right now since we're slowly rolling out features since we want to offer value to people.
Try the sign-up link with the referral code (https://bk.poachme.dev/PayMeToo)