First, let's establish what your site is. It is, of course, a free site, but, as stated, it is far from being the type of free site that most link lists will considering listing. But you don't need to change anything about your current site to get in on the free site game. You'll want to learn how to optimize it for sales and drive traffic to it from your submitted free sites though.
The free sites which they want are incredibly simple little things consisting of four pages: An index/warning/reciprocal link page, a 'main' page, and two photo or movie galleries. Take the time surf link lists like
This Depraved World,
Liquisexxx,
Floyd's Dirty Porn Links, and
PerveSpace. Surf their category pages and analyze what you see listed there.
There's nothing at all wrong with a warning page and the search engines aren't going to penalize you for having one. Most people here use warning pages on their hubs, link lists, etc, as do I, except I tend to warn people that there is adult content ahead by having Flash movies of porn stars scrogging on my warning pages.
Some have extremely minimalistic warning pages, like yours, while others use it as a massive link trading platform.
1 - I'm not sure why you'd deny Russian IPs. China is considered an all-around useless traffic source, so go ahead and deny them, but not Russia. As you've discovered, a few Russians own some very powerful traffic sites and you'll want to have a good relationship with them.
2 - On the topic of revshare versus per sign-up, the most important thing for you is finding a niche that you enjoy and a sponsor (or several) that makes it easy for you to promote them, exempli gratia, easy to find link codes, content, banners, etc. You'll find it far simpler and quicker to promote something that you enjoy and can understand why others would enjoy it as well. Stay way from anal creampie snowballing for awhile -
Ponygirl has that covered.
3 - If you don't understand PornAccess, then don't promote them. That was easy!
4 - I've been to a couple of conventions and didn't do any business at them. Some people, such as
Ramster and
Preacher, are much more business-minded than I, so they have the ability to pursue business contacts, even at a party. I fail in that aspect, as I do in many aspects. I go to hang out with people and tend to forget the whole purpose for the convention.
And in all reality, my business plan is very different from theirs, so I have no great to strike up a conversation with a sponsor rep, unless, of course, she's a cutie.