I've ranked websites in the past with spun content, and now they are still on #1 position of google. First year (2014) google found me because my spun was really bad, many paragraphs were just copied and my position drop from #2 to around #20 after a panda update. Later I cleaned all my text with better spun (I didn't buy any article!), my ranking went up again, and with more backlinks I reached #1 and it is still there
I am extraordinarily dissatisfied with WordAI. They are happy to take your money – we spent a good chunk of coin, but also sent in two support requests that were never answered. In the end, we told them that we had to like their AI and their humans before we’d continue trying their service, so this article, which is a great analysis of the products shows that there are other spin services our there and we will definitely be trying out the competition.