We have a service that can convert partial feeds to full-text for a lot of sites. If you're curious, you can try it here http://fivefilters.org/content-only/ and code for a slightly older version here https://bitbucket.org/fivefilters/full-text-rss
You charge for a hosted service. You also charge for a self-hosted tool. But you also offer an older (read: crappier) version of the same thing under AGPL.
I like the sound of the product, but there are too many red flags there.