I once had to sort a masturbation story that didn't involve any fantasy partner at all. It's not gen, it's not het, it's not slash... and those were the categories available on the newsletter. I don't even recall what I did with it! But you're right; that's a rather rare case. *g*

I could see SGA RPS as a subcategory in SGA fanfic, but I'd still expect it to be separated - it's just not the same thing at all. But I guess it depends on the fandom; in SGA I've noticed that stories involving the actors' other roles, RPS, and "ordinary" SGA stories are in much closer proximity to each other than in any other fandom I've been in. But I wouldn't have thought people did away with the separation altogether! I'll have to watch out for this in the future.