Sorry, missed this thread.
Every couple of days or so, myself and the other advocacy team members get together and brainstorm social posts to put out over the snapcraft social accounts. For an entire year now we have posted 2-3 times a week about individual snaps. Typically we are able to look at what’s new and updated in the store and create a post to promote the application. We’ve had a good pipeline over that year such that I don’t think we have had to repeat any of the snaps (other than re-shares which may happen).
If developers are keen to have their application highlighted, we are usually happy to accommodate, subject to it having good store metadata, functioning well and being something we feel good promoting. We can be pinged here on the forum or on #snapcraft irc on freenode 