Only standard WordAI spinner showed 12% match for me in Copyscape which is very good I think. Also I will add that for SPAM links in general you don’t need any quality at all. if Google crawler can’t find connection with other spinned articles – goal achieved. Sorry, but I don’t see that with expensive spinners as Copyspace shows that in plain sight.
Finest spinner in the market today and more for me because saves a lot of my time... Earlier i have used the best spinner but this spinner is 10 times better faster, easy to use, and articles make more sense, unique, also helps in preparing new articles and spins same article into hundred of more articles for back-linking, etc. 2 thumbs-up... simple and easy to use...
Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.