There will be prizes for users that are a certain number...
Every 100th user - an extra 4000 ryo
Every 1000th user - An extra 10000 ryo
User 666 - Demon Sword
User 1996 - Beam of Light
Dual account will not be awarded prizes. We can see your IP, and will check if you are actually another user. Dual accounting for these positions will incur fines... at least 1/3 of your money