Using one heavily spun article multiple times on one site...

Let's say you make sites where the bulk of the content isn't meant to be read, only the first few lines of each post are meant to get the user on and off your site fast through affiliate links.

Will heavily spinning one long keyword relevant article multiple times and posting it multiple times periodically help or hurt SEO? The big G will naturally crawl your site more, and see new content, but will it detect redundancies and penalize you, or will it even matter?

I've had some success doing this, but want others input before I branch out with it.

If it's spun well, yeah, it's fine.

If you need to check, compare the two in copyscape against eachother.

It is fine as long as there is no manual review or if there is, they cannot see they are all the same...

A halfway solution (much safer, much better SEO) is write a sentence or two at top for each page, related to the keyword you are optimizing for, have a spun segment in the middle, and have a sentence or two at the bottom related to your page's keyword.

This way, you are focusing each page on its keywords (vs. just spun unrelated stuff) and writing 100 articles would be very easy. Then schedule them into future.