WordAI automatically rewrites entire paragraphs and sentences – this functionality is offered by most content spinners nowadays, but not many are good at it. WordAI tries to understand in the best possible way, not just the words in the sentence, but the entire meaning of the sentence as well as its connection to subsequent sentences in the paragraph.
As you can see, WordAI is a lot more loose with the meaning of the text and uses synonyms wherever it can in order to produce the most unique content possible – this one is calculated at 98% uniqueness. Again, the purpose of such content should be for the lower tiers where you would need a higher quantity of links with not that high quality content.
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