Campaign strategy

I read the story of Obama's presidential campaign written by his team staff.
It doesn't sound either traditional strategy or professional one.
But it is new and well formulated to broaden his supports among voters.

I was impressed how much the Internet revolutionized the campaign, not only to carry on Obama's idea into a number of voters but also to take up money through online.
On the other hand, their success could be under the condition of voters' ability to use Internet and little transmission cost for donation. Ohterwise, $5 donation sounds unreasonable when considering about the cost and the donor's network environment.