Someone else

Noam Schieber of The New Republic on the Ames Strawpoll.

Huckabee spent exactly zero resources busing in supporters and still managed 18 percent of the vote. The other two campaigns bought hundreds, if not thousands, more straw-poll tickets than the number of votes they received. (Straw poll attendees must obtain a $35-ticket in order to vote. Campaigns typically buy them up and distribute them to supporters.) Huckabee bought around 1800 tickets and received almost 2600 votes. Clearly, Romney and Brownback dropped a lot of cash on people who ended up voting for someone else, and that someone else was probably Huckabee.