Referring to the second question in this thread, when faced with a problem like this, I always like to think of buckets. For example, just consider the 1st paragraph of the first seed article for a moment:

- There are 5 sentences, so think 5 buckets - one for each sentence
- Each sentence is rewritten 4 times. So, in total, you have 5 variations for each sentence
- So, put those 5 variations of each sentence into their respective buckets
- You now have 5 buckets, each with 5 sentences in them
- To create your paragraph, you select 1 sentence from each bucket
- Hence, when you select a sentence from the 1st bucket, there are 5 possible different ways to do this
- Similarly with all the other buckets, the are 5 possible different ways to select each sentence
- Thus, the 1st paragraph has 5 x 5 x 5 x 5 x5 = 3,125 different ways of being created (i.e. 5 to the power 5)

Similarly:

- The 2nd paragraph can be created in 1,953,125 different ways (i.e 5 to the power 9)
- The 3rd paragraph can be created in 3,125 different ways (i.e. 5 to the power 5)
- The 4th paragraph can be created in 625 different ways (i.e. 5 to the power 4)
- The 5th paragraph can be created in 78,125 different ways (i.e. 5 to the power 7)
- The 6th paragraph can be created in 1,953,125 different ways (i.e. 5 to the power 9)
- The 7th paragraph can be created in 3,125 different ways (i.e. 5 to the power 5)

Now let's look at the finished article. This article is created by combining 7 paragraphs.

There are 7 paragraphs so think 7 buckets, 1 for each paragraph. Get where this is leading us...

- The 1st paragraph bucket has 3,125 different variations in it
- The 2nd paragraph bucket has 1,953,125 different variations in it
- The 3rd paragraph bucket has 3,125 different variations in it
- The 4th paragraph bucket has 625 different variations in it
- The 5th paragraph bucket has 78,125 different variations in it
- The 6th paragraph bucket has 1,953,125 different variations in it
- The 7th paragraph bucket has 3,125 different variations in it

So to create the article you choose 1 variation from each successive bucket. Giving the total number of different articles possible as:

3,125 x 1,953,125 x 3,125 x 625 x 78,125 x 1,953,125 x 3,125

This results in a number that is very roughly 5 million, million, million, million, million. (I will not use billions or trillions here as, depending on what part of the world you originate from, the terms billion and trillion can mean different quantities.)

If, in effect, you have 5 seed articles, then think of 5 even larger buckets, one for each seed article, and repeat the maths. You end up with a very, very, very large number which is in the region of 1.5 google - yes, a google was a very impressive number long before it was a search engine giant!

However, I find the number of variations somewhat misleading. If you go back to basics, you find that you have written 25 different versions of the first sentence. So, if you use the spintax to pump out 1,000 different articles, each different variation of the first sentence will be duplicated 40 times on average. This is why I like to spin at the word or phrase level along with sentence and paragraph spinning.

If I have misunderstood your original question, or if I have committed basic arithmetic errors anywhere, my apologies. I am sorry for having consigned vital Internet bytes to the futility of my musings