Google is getting VERY good at catching spun content so you'd better be talented at manual spins. If they DO catch you, of course they'll spank you... and hard. So anything you use spun content on is inherently AT RISK. Worse yet... Google gets better at finding spun/poor content every year. So in the longrun you're screwed. I'd weight your other options and see if you couldn't find a cheaper source for manually hand written content. 

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.
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