I am trying to follow the transition to Medium and the issues that are arising, I believe there is more than one technical glitches that are requiring coding and servers. There is also the standards that we may have breached inadvertently with the switch in platforms. So I thought I would give you a snippet of what I have seen.
1.) Pundits are now the Editors, who will assist the Horton's in posting to the Yabberz main page. Your story may go to a pundit that has not checked their emails or doesn't know their position in this. This is something I believe is being fixed in the background.
2.) Medium is a publishing site, meaning that the stories and discussion starters must adhere to standards in the publishing business. That is why there are editors and submission guidelines.
3.) You do not have to pay for a membership: via Medium "Do you need a Medium membership to publish in the Partner Program? No, you don’t have to be a paying Medium member to join the Partner Program and earn money for your writing. Anyone with something to say can join for free and start earning. Your monthly membership fees go directly to the writers whose work you enjoy."
4.) Once you publish your story on Medium it is on your profile. To submit it further to the Yabberz homepage requires you click on the bottom of said piece where there are three dots. One option is submit to Yabberz, highlight that and follow directions.
5.) If you are unaware of publishing standards, citations and usage permissions, I suggest a review of this site.
6.) Medium is very strict on imaging permissions and copyrights, using free use images with citations is advisable as to not cross into a legal quandary. Here is a link to some sites that offer these services and free use.
7.) Medium is asking for people to use their voices and original content. So the plagiarism angles are going to be looked at in the whole, but I wouldn't worry about that part unless the copy paste becomes the standard.
It is an absolutely huge site, a lot of people and areas to follow and these things take time to pick up. Go out and look around and find your interests. It is not a difficult place to post. It will also take time for folks to get used to change.
Just my two cents. :)