Has a 250,000 words monthly limit on the “Turing Spinner” and a 2,500,000 words monthly limit on the “Standard Spinner”. Anything above that will be charged additionally ($10 per 1,000,000 words for the “Standard Spinner”, and $3 per 10,000 for the “Turing Spinner”). However, they do offer custom plans for heavy API users – all you need to do is contact them.
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.
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