Marlborough university and dr. John Bear

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Marlborough university, the notorious degree mill, used to sell John Bear's guide.
Actually, they said reading the guide was a "must".
See attachment.
Now of course (as John Bear argued ), none would prevent anyone else from buying a token number of copies of his guides for resale.
The evidence we gather here is that Marlborough university kept on selling a certain edition of the guide.
The reason was that -in that particular edition- comments about Marlborough were lenient, growing harsher/more critical in later editions.
The point is: since dr. John Bear included Marlborough, this means he had evaluated them...but if so, how would his opinion change from lenient to very harsh, Marlborough being the same?