Question 1

What can a Redshift model push into Reddit Ads?

Accepted Answer

Custom audiences and conversion events. Rows returned by the model become audience members, and separately you can report conversions that happened off platform so Reddit can attribute them. Audiences are the usual starting point, since they let you target or suppress specific people based on what you actually know about them rather than on the interest categories the platform offers.

Question 2

Can I match on mobile advertising IDs as well as email?

Accepted Answer

Yes, and it is often worth doing both. Reddit accepts an email address or a mobile advertising ID, though not a phone number, which is a difference from Meta and TikTok. If your warehouse holds device identifiers from an app, those frequently match better than an email address somebody gave you years ago, so including both columns in the model and letting the platform resolve what it can tends to lift the match rate.

Question 3

What exactly gets transmitted to Reddit?

Accepted Answer

Hashed identifiers, not raw ones. Polytomic hashes before transmission rather than passing raw values for Reddit to hash on arrival. Plaintext in the model is accepted and hashed on the way out, and already hashed columns generally pass through unchanged. Nothing else from the row travels unless you map it, so keeping the model narrow is both cheaper to query and simpler to explain in a privacy review.

Question 4

How do I keep a Reddit audience from going stale?

Accepted Answer

Refresh it on a schedule and handle removals explicitly. Add mode keeps adding and there is a remove mode for taking members out, but Reddit does not expose a mirror mode that reconciles membership against the model automatically, unlike Microsoft and Meta. So the reliable pattern is two models, one describing who should be in and one describing who should come out, running on the same schedule.

Question 5

What does this replace?

Accepted Answer

Usually a recurring calendar reminder and a CSV. Someone queries the warehouse, exports a list, uploads it, and repeats until they forget. That works until the definition of a good prospect changes, or until the person who owned the process moves on. Reverse ETL turns it into a model that runs on its own, using the same definitions your reporting uses, so nobody has to remember anything.

Sync Redshift to Reddit Ads

Sync Redshift to Reddit Ads with Polytomic

Email or mobile ID

Hashed on the way out

Conversions supported

Or sync Reddit Ads to Redshift

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Connect Reddit Ads in Polytomic

Create a sync between Redshift and Reddit Ads

Map fields and enable the sync

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