My point actually that your idea gets fallen apart because of what I wrote above.

I would compare it with Fabiyamada. She is with great voting power compared to other participants so far, it is worth to notice that her voting power is far below of Biandi for example. Fabiyamada is helping your contest buy upvoting other comments thus adding a substantial reward value.

In this last case that I wrote above you can see one taking a reward while not contributing at all to the contest. Namely other comments are not getting any value.

All in all very few participant really received author rewards so far for their comments in your contests. That is because only Fabiyamada was big enough to bring reward value of a comment to the minimum payout of Hive Network.