Thank you, Daniel. Ultimately people are responsible for their own growth, no matter whether it be artistic or otherwise. But like will attract like; that is the way of the universe and so is making sure we all grow and learn.
I have found the challenge personally and artistically rewarding. So I will continue business as usual: writing a poem each day and visiting other poets. I never limited myself to 3 poems a day. Where some are concerned who perhaps have not supported the work of others very much, they will get back what they put in. That is also the way of the universe.
There will always be social loafers; and sometimes, they are not loafing at all but just have other demands the rest of us are not aware of.
It is your contest and I would say make the rules as you would have them. I would warn against policing others because that will be stressful and time-consuming for you. I want you to understand I am in no way upset by the change in rules. It's just not something I want to do. But I get it.
If you want my advice for the future. I would offer a reward once a week like you are going to do now. I would link the rewards to the value of the posts that are directly related to administering the contest and I would assign some roving comment up-voters. That is ... have some of the prize pool go to the comments and not just the poems. This would encourage people to comment more. But a certain amount of attrition should be expected. There are still lots of people persevering. I think you have fostered poetry beautifully.