Definitely. All three levels of membership will still offer you something. With ‘Listing‘ and ‘Featured‘ you can encourage people to visit your website and enhance your ability to be found on search engines. Also you will benefit from the community aspect of the site via the forum.
Even if you already have a website, you may consider ‘web‘ membership for the blogging facility, the social media linkage and even the shop – where your goods or services can be sold..