my take is that there is just a firehose of content to compete with. for me, i only have a very limited time to intake content (everyone has their own ratio of in:out) so it causes me to ignore things that take much time to extract the value from.
on the other hand, sometimes it's good to just take a deep breath and slow down and just listen to others for a while, which i do see value in.
so i made it down to the part where you start listing out rules for winning a comment prize and frankly it sounds like more work than it would be to just converse with you about interesting things. i think that some kind little value in information exchange and are only seeking straight monetary "value" and maybe they would read through the rules and try to leave a good comment in order to get some SBD, right? but i value creative ideas and actually what i see in your post is a desire to provide a creative solution to the firehose of content. i don't want to go make comments on your other posts to win a contest, but i do like your writing so i already want to read your other posts.
see what i'm saying? i think that if your writing is good and your intentions are good then you will get engagement over time, and of course you're doing a great job of trying new things to see what works!
in conclusion, i don't personally go for the contest incentive for a "good comment" but i do like your writing and i sense that you have great intentions, so i will keep following you and i do hope that you get the kinds of reactions that make you happy here :)
cheers,
josh