Checks if we get back an empty collection when we grab subscribers.
How should this be manually tested?
On QA, find a competition or create one where there is only one person in the competition, then unsubscribe. Send a message and nothing should be sent.
Any background context you want to provide?
Without this check, it would default send to everyone in the competition, which is the exact opposite of what we want.
What's this PR do?
Checks if we get back an empty collection when we grab subscribers.
How should this be manually tested?
On QA, find a competition or create one where there is only one person in the competition, then unsubscribe. Send a message and nothing should be sent.
Any background context you want to provide?
Without this check, it would default send to everyone in the competition, which is the exact opposite of what we want.