I've run a wordpress based web development business for 8 years, and I am shocked at the behavior of this plugin maker.
They state that they have a 30 day complete refund/satisfaction policy, but they will not honor it if you buy their subscription and cancel within 30 days. Customer service will not budge, and they would rather keep your one time subscription fee of $229 dollars than bet that their product is good enough to bring you back.
I have found WordPress plugin developers to be very fair, and always honor any initial 30 day satisfaction guarantee. It was my mistake to believe they would honor their own policy:
"If you believe that buying a product was not the right decision and you think that the product you have purchased is not the most suitable for your needs, we want to make things right. Within 30 days of purchase, YITH will reimburse the full price paid on request."
It wish I had about WooCommerce "Product Vendors" when I made thought YITH would be a good idea... Product Vendors is cheaper plugin that does the same thing, and a much more honorable vendor!