Our statistics show that the campaigns that fail are those that start to progress slowly. On the contrary, campaigns that get off to a good start are less likely to fail, because Internet users then make purchases to complete them.
To reduce the risk of failure - one of the principles we set out in our ethics charter - we allocate clicks by default to the campaigns with the slowest progress, which significantly reduces the number of failed campaigns.
However, if you wish to attribute your click to a particular campaign, you can click on the cogwheel before making your click in order to choose to which campaign your click will be credited.
Similarly, you can choose to assign your default clicks to the campaigns whose end is closest in time if you wish.