In Feb14' version we've added RTP activities to the smart campaign standard filters and triggers.
Therefore you should no longer use the old way of capturing URL parameters in order to measure your campaign performance and engagement.
Please follow the instructions below to set up your smart campaigns in the new way:
https://docs.marketo.com/display/DOCS/Define+a+Smart+List+for+Web+Personalization+Activities
https://docs.marketo.com/display/DOCS/Define+a+Smart+List+for+Predictive+Content+Activities
Cheers,
Yanir.
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