Advertisers’ budgets hit by growing cost of ‘click fraud’: “‘We used to have a click-through rate of 1 to 2 per cent for each time one of our ads was shown,’ said Oscar Jenkins, chief executive of Dynmark, a company that sells bulk text messaging services. ‘Then suddenly in October it increased to around 60 to 70 per cent. We had exceeded our advertising budget by 10 in the morning.’”