Dear Razor 7826,
You need to use a name to make a copyright statement. Pen names are quite common and perfectly acceptable.
Believe it or not my R/l name isn't Mad Lews but something much less mundane. still I get away with copyright Mad Lews 2007, and that will stake my name to the story.
E-publishers payments vary and are usually listed in their notes to authors page. The two I'm familiar with are
http://www.bdsmbooks.com/ which pays 40% of each purchase for first run stories. (not published elsewhere) royalty's are payable monthly and can be payed via p** P*l (which doesn't know its dealing with adult material)
http://www.a1adultebooks.com/ on the other hand pays 60% royalty's but you can only collect payment when they owe you $50.00 or more. If you're a best seller no problem but for more than a few it leaves you high and dry.
Both are looking for adult stories of about 30,000 to 50,000 words. They will take some collections of short stories that are exceptional if the entire collection meets their minimum size requirement. I also suspect it depends on how desperate they are for stories at the time. Try to remember they need to put out 4-8 books a month. You are producing a product for them and they are not doing you a favor. It's a business.
hope that helps
Mad Lews