Do tracking pixels for SmartPromos expire?

Tracking pixels for dynamic SmartPromos aren’t tied to a specific date, and they never expire. You can use the pixels for dynamic campaigns whenever you’d like and they’ll work. However, reporting and analytics may not be as clean or readable if multiple campaigns use the same dynamic SmartPromo pixel. We recommend creating several dynamic SmartPromos for the cleanest data. 

For baked-in SmartPromos, we only pull in impressions for the 60 days after publish date for the episode containing the ad. After 60 days, the impression data will drop off for the SmartPromos.