“When you subscribe to smaller communities that don’t have as many members (and thus have posts that may not get as many upvotes) it’s hard for them to compete for a space in your feed. To help them out, we’re running a test to feature them more often in notifications for the first one to two weeks. People in the test (and all redditors) will have the ability to visit their settings to lower the frequency of the notifications they receive from a specific community or turn them off altogether.”
Here’s what went out January 20th–February 2nd