Multiple Recips on Warning Page

[Simon IA Cash]

Hi everyone. I'm just getting started submitting my freesites, and have a few questions.

1. Why do many LLs want more than one recip on the warning page, including some that aren't even for their site? Does the referral traffic between the site I'm submitting to and the other site's recip code get tracked?

2. I've read in different LL rules that no hardcore content whatsoever is allowed on the warning page. How common is that restriction? For cases when it is not allowed, what counts as hardcore? For example, a pic of a girl with a lump of spunk on her lips?

3. After all the warnings I've read on this board about doing it right to avoid the BL, I'm a little bit paranoid about submitting my freesites. I wanna do it right. Some sites say that I will get the recip link after I submit (http://www.adulteverything.net/ae/addurl.html for example). I guess those are contrast to sites where they say "no changes to the site after submitting" right? For that adulteverything page, it has a field for "linkback"... what should I put in there? The URL where the recip is?

Thanks in advance for whatever help anyone can offer. Much appreciated.