One drawback of pay-per-click models is the possibility of abuse by repeatedly clicking on a link to inflate revenue to the host or increase the costs for the advertiser.

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Pay-per-click models are vulnerable to click fraud, where someone uses automated tools or pays someone to repeatedly click on a link to increase revenue or cost for the advertiser. This is a major drawback of the pay-per-click model.

One Drawback of Pay-Per-Click Models Is the Possibility of Abuse