I don't have an issue with you doing a contest within COM. A few other people have already done that to get more publicity, and if it helps the community then great.

I think I agree with the profoundly profane guy up there and say that your contest is too vague. even the other contest I've seen in a similar format have got clear rules. If you are open to suggestions, I recommend:

• put the rules in a list like this
• define how much you're giving away. e.g. 10SBD or the post payout.
• have you thought of doing a steembounty?

If all you want is publicity, then do a really, really good entry to Comedy Open Mic. Quality posts always get attention.