There is a contact form: https://www.uvlist.net/contact/
I don't think it will help much in visibility. You must hope that the admin/owner of the site sees your request. That said most "commercial partnership" inquiries in the past were spam and you should note that the idea of commercializing this site does not find much support in the user/editor base of this site. So I do not feel the need to try to contact admin via Email because of this.