It's because you need to post a lengthly review to earn alot of points. You have to point out corrections if you see any, tell why or why you didn't like the piece, etc. There's a checklist to the right side if you need more of a guideline. 250 words is a rule of thumb for posting to at least receive points for it.
Hope I helped,
~ Wolfy
"'Death happens,' as we like to say. 'And when I get paid for it, death happens more often.'"
"La shai'a waqi'on motlaq bal kollon momken."
"We are all books containing thousands of pages and within each of them lies an irreparable truth."
Yep, you definitely should lengthen your reviews! Try following the checklist, which tells you tips on how to elaborate your reviews.
Also, welcome to YWS!
Ubi caritas est vera, Deus ibi est.
"The mark of your ignorance is the depth of your belief in injustice and tragedy. What the caterpillar calls the end of the world, the Master calls the butterfly." ~ Richard Bach
Someday, everything is going to go right for you, and it will be so wonderful you won't even know what to do. — Hannelore Ellicott-Chatham, Questionable Content