I think NOT signing the renewal contract. They did have several partners Jet, Amazon, eBay, Sears which they worked with.
They kept $3000 claiming a prepaid service (for launching into a new marketplace) was non-refundable. I pre-paid for an extra launch support. Unfortunately everything did not work correctly with quantity data causing major problems with my marketplace store. After 1 year of service, I had asked that the launch to be refunded as I could not afford to renew, being ($12,000/year) I was told it was not refundable. They gave me the cold shoulder.
The setup process was very long. It took close to 3-4 months until everything was launched. Appointments with the "Launch specialist felt like a waste of time. Appointments where spanned out over 2-3 week intervals, which I think caused the biggest delay.
Their system caused my marketplace store to fall out of compliance resulting into a complete shutdown.
My Initial $25,000/mo revenue turned into $10,000/mo due to canceling all listings, and creating new ones.
Marketplaces like Ratuken was a complete waste of time.
Their solutions are suited to large businesses. Do not consider using them unless you have your own dedicated team working with data conversations; and can afford to lose 50-70% in revenue during the first 6 months.
I have realized after being out of business, how to adapt, and find solutions else where. Shopify is a lot more affordable. If you are a small to medium sized business, I would look else where for service.