There is also the option to spin capitalized words (assumed to be proper nouns) as well as leave any number of words unchanged, depending on whatever you enter into the "ignore" field, separated by commas. You also have the option to only keep the sentences that were altered a minimum percentage, as indicated by the "Keep Sentences that Changed" option.
Spin Rewriter 5.0 technology was a previous edition that allowed their clients to use the basic article rewriting system. Their newer versions over the years have just kept getting better and better. The new Spin Rewriter 9.0 technology gives you the option of assigning variables to your content. Their software is dead easy to use. In just three steps you can have up to 50 uniquely spun articles.