I expected when I offered the prize money, there will be members who make posts of little value. But as per the conditions for the competition, spammy accounts will be excluded. I'm not saying you cant make short posts. But I'm saying an account that has made a lot of short meaningless posts will be excluded.
Anyway this forum is still new. It is being promoted still but it takes time. The increase in speed and forum activity will be gradual.
And about 50/50 bets, safe is not always best. Consider the house edge for long term value.