I am the owner of a adult site.

I want to use Vbulletin on a forum for it.

I was told I had to have a OWNED version of it and not a leased version of the software for an adult site. Can anyone tell me if this is true. I don't have a lot of cash but if I can use a leased version on my site then I am waiting with credit card in hand. I have searched the site and haven't found an answer to this question. Can anyone help?

Thanks