I don't know that it's an 8"+ site. I also won't speak for other women, just myself, and my own observations. I don't think women are quite as interested in penises as men are. I'm not stating that as fact, just supposition. I mean, look at this site. Look at the ratio of male to female posters here. Then, look again, and realize that lots of the women are men pretending to be women in order to convince hetero men to show them the goods and pay attention to them in a sexual context. (Though, lately there seem to be way fewer fakers than in years past.)
Personally, I don't spend much time looking at galleries, and zero time in the Show Off board. I look at the galleries after ages of fun, flirty inuendo, though particularly charming members pique my curiosity faster. When I first got here, I bought a subscription and ogled dicks for countless hours. Now, unless it is attached to someone I've gotten to know, they all look the same and I couldn't care less. I don't have a preference for size, and have appreciated peens across the spectrum.
But if you're not getting lots of comments from women here, and wondering why, a lot of it may be related to the things I've mentioned. The best way to get attention from (real) women here is to stick around and be yourself, and post to the areas the women frequent most often. (Though, if you post lots of men's issues to women's issues, that's gonna create friction between you and the ladies over time. You're better off in Ask A Woman, Sex With A Large Penis, and Relationships.) Get to know the women who are active here, and some of them will want to get to know you and your gallery. Also, there seem to be women who love the galleries and never post. I think the best way to get to know them is to comment on their galleries. Maybe they'll look at yours and comment too. There are also women who like the chatroom. If you go on cam in there, and don't constantly ask for attention, but participate in the conversation, or strike up interesting private conversations, women might request to see your cam and pay attention to your dick. Or not. Above all, don't feel entitled. You have to remember that everyone here has his or her own agenda, and it just might not be the same as yours. Good luck.