I thought that Folksy policy promoting any sales other web site wasn’t permitted. I’ve just come across this one posted on Folksy Community Group for Buyers and Sellers (UK only)
You could report it to the admin on the page x
Agree report it. I reported a new shop this morning who had their website in the about section. Plus the blog link went direct to a website.
I think that FB group isn’t run by Folksy themselves so I’d report it to the group admins and they can check if it breaks their specific group rules.