Hello dear OP
I think you are looking for something like this: (I have used one of your own paragraph and have prepared a sample 'seed' article, just for my friends here who might be interesting in working for you.) I could have done a better job, but this is an average effort that will give you all some idea of how an article is spun. This is not nested deeper or it would have become very complex to understand by everyone.
Your paragraph:
Sorry, I thought it would be good for people to have a definition of a seed article, I posted this job with great detail on 5 freelance boards and then this small post here on BHW.
'Seed Article' Example:
{Sorry,|My apologies, but|I sincerely am sorry to say this, but|I apologize,|I am sorry, but} I {thought|believe|imagine|guess|reckon} it {would be|will actually be|was potentially|could actually be|is really} {good|better|great|much wiser} for {people|every one here|all of you|everybody|the sake of all|all my friends here|those who may not still know,|you all|all} to have {a definition|a meaning|a true picture|an understanding|details|some idea|an idea} of {a seed article|what a seed article actually is|how a seed or spin-ready article looks like|what I mean by a seed article}. I {posted this job|wrote about this job|opened a job-post|placed a forum post about this {type of work|job}} with {great|every|complete|extensive} {detail|requirement} {on {5|five} freelance {boards|websites|forums|marketplaces}|on a handful of {forums|marketplaces|workplace} for freelancers|on {5|five} marketplace websites|on 5 well-known freelancers' sites wishing to seek expert freelancers,} and {then|after that,|later|afterwards,} {this small post here|this little post|the present post|this post} on {BHW|Black Hat World|
www.blackhatworld.com|this forum|blackhatworld.com|B.H.W|this great forum}.
Spin 1:
I sincerely am sorry to say this, but I thought it was potentially better for all my friends here to have an idea of what I mean by a seed article. I opened a job-post with great requirement on 5 well-known freelancers' sites wishing to seek expert freelancers, and afterwards, this little post on Black Hat World.
Spin 2:
My apologies, but I imagine it could actually be much wiser for all my friends here to have an idea of what I mean by a seed article. I placed a forum post about this type of work with complete detail on 5 well-known freelancers' sites wishing to seek expert freelancers, and after that, this post on
www.blackhatworld.com.
Spin 3:
I apologize, I believe it could actually be great for all of you to have some idea of what a seed article actually is. I posted this job with every detail on five marketplace websites and after that, this post on blackhatworld.com.
Spin 4:
I sincerely am sorry to say this, but I reckon it will actually be great for everybody to have details of a seed article. I opened a job-post with every requirement on five freelance forums and later this post on BHW.
Spin 5:
Sorry, I thought it will actually be much wiser for you all to have a true picture of what I mean by a seed article. I opened a job-post with extensive requirement on five marketplace websites and later this little post on this great forum.
Spin 6:
I am sorry, but I guess it is really much wiser for people to have an idea of a seed article. I posted this job with extensive detail on 5 well-known freelancers' sites wishing to seek expert freelancers, and then the present post on blackhatworld.com.
Spin 7:
Sorry, I guess it was potentially better for all of you to have an idea of what a seed article actually is. I opened a job-post with complete detail on 5 freelance forums and later the present post on
www.blackhatworld.com.
Spin 8:
I apologize, I believe it will actually be better for the sake of all to have details of what I mean by a seed article. I wrote about this job with every requirement on 5 freelance boards and afterwards, this post on this great forum.
... and so on!
There can be deeper and more complex 'nestings' that will achieve more 'spin', but then... Awww... you get the idea! Too much work, too much time required...
Of course, you'll still need to edit every article to weed out bad seeds! (Weed out some punctuation / grammar / etc. mistakes... then reformat the seed till it is perfect! And then if the 'master' asks you to change some text / reformat.... you just had it!!!) Well, even after polishing, spit-polishing, and more spit-polishing, the seed will still have some mistakes.
And if you aren't careful while editing, then you'll definitely screw up the whole previous effort... Hence most of these job-givers aren't satisfied 10% with the 'super-human' efforts.

Still, good luck to you all!