Based on our record, Adform seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I would highly recommend starting from Adform or Smart. Those are quite easy to manage if you just started your journey with programmatic. Adform: https://site.adform.com/ Smart: https://smartadserver.com/demand-partners/. Source: over 2 years ago
BuySellAds - BuySellAds.com Online Advertising Network
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Google Audience Center - 3 votes and 6 comments so far on Reddit