Do multi-ad templates have a negative impact on quality metrics, such as click-through rate and viewability?

Opti Engage is already running on over 200 websites across 32 geographies and there has not been a substantial decrease of Click-Through Rate nor Viewability Rate to date. 

In specific display contexts, multi-ad templates might have a negative impact on quality metrics compared to single ads, therefore campaign quality metrics are being monitored on a daily basis.