Compare https://wikitech.wikimedia.org/w/index.php?title=Special:UserLogin&returnto=Main+Page&type=signup
with https://github.com/signup/free
Already the URL is more scary! But most important:
In that stage, do we really need...
- The huge disclaimer.
- Your domain.
- Instance shell.
If I understand correctly the page, these fields refer to the shell creation. But what is the percentage of new users that will need that? (And Hadoop in the future?) Can we have an additional, optional step for them? In exchange the (presumable) majority of Wiki&Gerrit-only users will have a much simpler and welcoming page.
Also, does it make sense to ask for optional email address when Git/Gerrit make only sense with an email address? Why not making it required?