In the short term, this helps Google; they profit from each click, with the advertiser paying Google. In the long term, sure, _if_ enough people use it (they won't) then advertisers will start demanding Google do something (I strongly doubt advertisers would pull out of Google altogether). Google will then proceed to add a score to each click "probability that this click was by a bot" which would be pretty easy to determine given they're prowess in this area already.