Way short! They needed 4,678 pledges but only got 877:

Campaigners hoped to raise the raise the £23,400 necessary to buy a prominent two-week slot on a “bendy bus” by collecting £5 pledges from atheists online.
They even made a mock-up photo of a bus carrying their chosen message: “There’s probably no God. Now stop worrying and get on with your life.”

The ad was in response to a Christian campaign that run ads on the sides of the bus quoting Scripture:

The religious adverts carry Biblical quotes such as: “When the son of man comes, will he find faith on the earth?” and direct readers to the JESUSsaid.org website.

When I read this I wondered if there really aren’t as many Atheist fundamentalists as they think there are or if they just aren’t willing to pay to proclaim their message that there is no God. It’s easy to sit on the Internet and blather on about helping the delusional but it’s another thing to actually foot the bill for it.
Maybe they didn’t like the fact that the sign said “probably.” I’ve never read an atheist online who was that tentative about it.
(via)