I agree, random, chance or lottery is not using evaluation of consciousness and can add useless 0-long-term value additions to the platform that only extract without adding anything of value itself. Posts that people an be interested in long into the future are long-term value. A contest should generate long-term value to be of benefit to the platform in the long-term by potentially continuing to add value for people who find that content.

That contest is interesting. I don't know how to apply that beyond your scope. Any ideas?