@memeisfun, in principle I like the idea as long as it is quite strict that this is only for the original poster's own work.
Second, rather than have a "300 words" clause, why not make the requirement a little more subjective like "poster must explain why they chose to take this photo AND why they thought it turned out well enough to warrant sharing with the community."
Presumably, the intent is to maintain the integrity of quality content in the community. So tell us that you actually thought about what you were doing rather than just try to harvest rewards with an endless series of photos of a half-eaten taco.
=^..^=