The former join form asked for: what you were applying as (founder, investor, media, content, factory, or partner), your name, a profile link, how you can be useful, how you heard about us, what excites you most, and a confirmation that you've read the house rules. That is the whole form. There are no hidden fields, and nothing else about you is captured when you submit it.
If you email us or book a call instead, we obviously end up with whatever you put in that email or booking. Same rules apply.

