How to advertise my Yaoi Site?

[DizzyKat]

I have a yaoi image site : http://www.bishibooru.com that has tons of male only images of original, comic, and anime/video game characters, both worksafe and non-worksafe (You have to register to see the adult pics). I want to do some free advertising since I'm paying for facebook ads. I looked at webrings and they all used to be free back in the 90s early 2000s but now they're all ones you have to pay for.
I've made flyers & banners in the forums: http://bishibooru.com/forum/index.php?topic=33.0
I was gonna try anipike, but it's pretty dead...God, everything I remember all the sites, are pretty much gone. I don't blog or anything...so there's nothing there.
Any suggestions guys and gals?
I don't want to make money. I just want to advertise. Thanks though, I may use that in the future.