eBooks aren't "bought" in bulk. This is about eBooks. Not books. Do you understand the case? I ask because this is now the second time you're posting something that doesn't make sense.
The clauses most definitely made prices go up. Again - I think you're misinformed.
And the publishers actually made less (they stated so) most of the time with the new deal in place. They did it (most likely) for other reasons which I posted in another thread - which deals with saving the printed book market.
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They already have?
How did the clauses themselves make the prices go up? Publishers determined the price to sell their books at.