That’s really weird. I have tested WordAI and Spin Rewriter with Copyscape and the results were always 80%+ uniquness, even 90%+. I don’t know how u spun the content to achieve such low results, but this is definitely way too bad. As for the block spinning, I have to be honest, this is the first time I’m hearing of it and I will have to check it out when I have a bit of time, but generally, yes, in the best case scenario, you would manually touch your Tier 1 content to make it 100% human readable and as unique as possible. For lower tiers, you can do pretty much anything, but again, the better quality of content, the better results you will have. That’s in my opinion and experience.
I love EVERYTHING!!!! Spin Rewriter is extremely easy to use, and the quality is the best available on the market... PERIOD!!! Even if you are new to marketing, you know that content is a major cornerstone. We use to spend thousands of dollars having content developed. Using Spin Rewriter has cut our costs by 90%. The best part is we did not have to sacrifice quality in order to increase production.