You got a point, daily snack might be based off the amount of attention something gets in a day. I've got a good feeling it'd have to be a lot to get past trending + popular and into daily snack - but I meant it as in significant changes to the algorithm, enough to warrant a new thread from staff announcing the changes.
Daily snack used to be just pure gag-a-days or comics where you didn't need context to enjoy them, but that thread mentions Michael finally added in long-term comics and in order to increase your chances you'd have to have an 'introductory' episode that reveals your MC and so on.
Novels probably have the same requirements where you need to reveal the who/what/where/when in the first few pages. They're basically the same as long-term comics without the pictures, you have to be invested in a novel most of the time.