That wouldn't work because the number you give would be no different than if the judge just kept the hidden score... and it would be more accurate still if they did keep the score hidden. Just handing out a set amount of exp for good, bad, and amazing threads isn't the topic, and would put more bias on the players involved as well as how the mod reads it.

Say a mod looks over my thread... they say, yeah, it's good. Here's 1000 exp. That's not going to work, even though the system says a good thread should get that much. I'm level 5, if they skim it and keep the number secret but use the formula I would receive 3000+ exp.