You can see from the result of the spinned article that it is indeed highly readable, though it’s not that perfectly readable and it would still require some minor edits, though not really the best article spinner out there but I think the quality of the spinned articles would already suffice for the contents of my Tier 2 and Tier 3 link building campaigns

Spin Rewriter integrates with almost any SEO software. This allows you to post high quality articles quickly and easily. The only drawback is that you only get something like 300 API requests every 24 hours. You can quickly burn through this if you’re doing multiple campaigns. The developer does not currently offer a plan for heavy API users but maybe they will in the future.