Each catalog created in Reddit must be connected to its own pixel in order to run ads with. If you only have one pixel created and want to run your Marpipe creative, you must replace the current product source in your catalog with Marpipe.
In order to run Marpipe on Reddit, you can follow the steps below to get started:
Create Your Feed
First you'll need to create a new output feed. You'll need to make sure you have Single Treatment Feed selected in the window that appears, as that is the only form of feed that is accepted by Reddit.
Once created, you can add in your design(s). If you'd like to add a design that's currently being used in another feed, you'll first need to clone it in the designs page in order to add it in.
Once your feed is ready to publish, click Publish
Add Your Feed to Reddit
Once your feed is finished publishing, you can copy the link and log into your Pinterest Business Account.
Navigate to Catalogs Manager the sidebar of your business account
You can then go to Settings under your existing catalog
If you are replacing your current Product Source with your Marpipe feed, simply click on the edit icon of the existing source:
Then just paste in your Marpipe URL, replacing the original source
If you are creating your Reddit catalog for the first time, follow Reddit's steps here using the Marpipe feed as your primary data source.