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Re:$15,000 In Income From An EBook, How I Did It by bdunn on Wednesday September 19, 2012 @11:41AM (#4544029)
There is more to success than the income.

1) You build a mailing list of people who have bought from you in the past. HUGE value here.

2) You get some extra personal brand exposure. Invitations to speak at conferences, podcast interviews, and so on.

3) Passive income is the gift that keeps on giving.

Re:$15,000 In Income From An EBook, How I Did It by jbigelow76 on Wednesday September 19, 2012 @11:56AM (#4544095)
Good points but don't forget that he probably also increased his expertise in Ruby which itself drives value in his consulting work.
Re:$15,000 In Income From An EBook, How I Did It by tomjen3 on Wednesday September 19, 2012 @02:02PM (#4544685)
Not necessarily.

But it certainly increased his percieved value.