Just like what you said... It would be more fun to make it as a game. Like... 30 exp for the first commenter in a certain novel (state the title).
Make a good comment and got at least ten like to receive 10exp. Or 1exp for every like. And maybe involve the forum for the missions. As we are much active in the forum rather than the review section which full of scam review. I remember that 1 review in an unreleased title at the voting section. I hate those kind of reviewer. They don't even read it! It's rude to the Author, TL and ED! So I decided to give 5 to balance it. But what can I do? My review only gave the title 3 rate. Fortunately, there's people like out there who help me balance the rating until it was acceptable.
That is one of the reasons why I hate the review mission.