Has anyone here done an Amazon bestseller campaign where you get all kinds of celebrities with big lists to email their list on your behalf in return for the celebrities supplying gifts that will be downloaded?

If you have, did this work well for you? 

I helped organize bestseller campaigns with several of my editing clients. The results on Amazon were mixed--one person did very well, but he was already a celebrity in his field and thus had no trouble getting other celebrities to email on his behalf. He achieved good sales because the emails had gone out to over 2 million people. But most authors, particularly first-time authors, are not that well connected. 

The others' success was more modest. One author got an increase in sales that lasted a couple of days; another didn't get significant sales but did get some good reviews on Amazon as a result of people looking at the "inside the book" part of Amazon's listings, and two others got no significant increase in sales. 

If you have tried this, what has been the result for you? Would you advise authors to do it? Would you do it again?