Great question. You cannot promote "any" website here. I'm sure there are some that I would not allow to be promoted from here. But generally, yes, you can leave a link to your site with every post that you make. You are welcome to present the site you want to promote via Premium Membership, in advance of becoming a Premium Member, to be sure it is one that qualifies. If you need more aggressive promotion than this, we can discuss it. Contact Us. If you have more questions, please ask.