I would not use this even if it was free. Here is why:
I took a look at this to see how the Pattern websites are structured. The website is part of Etsy and is so deeply embedded within Etsy that it would be very hard for the search engines to even find it. All SEO would have very little effect in Google rankings.
Look at the URL address and count the number of slashes ("/")
https://www.etsy.com/your/shops/me/pattern/home. There are five slashes which means that the website is 5 levels deep and each level deeper makes it harder for SEO to work and for the search engines to find your shop. these are also powered by Etsy.
The website depends on Etsy and if anything happens to Etsy or Etsy removes your shop for some reason, the website is also gone.
There are so many better options for stand-alone websites. Use a different Web hosting service, if you would like your website to be easily found in Google searches and for all your SEO efforts to work.
I like Etsy for many reasons but this new venture is not very good for Etsy sellers.