Okay. But the purpose of making a new reply is to show the audience that the project is making new progress every week. If you read the post, they are weekly updates about the project.
As indicated in the rule, perhaps reserving 1 or 2 spots for your updates would be a good thing to do since your thread isn't actively covered with replies. You could make or edit the updates in the reserved spots then bump the thread for visibility (of course you have to follow the bumping rules like a bump at least 24 hours after the previous bump, deleting the previous bump when making a new one)
The possibility of basar your post is deleted because of copy / paste. For forum security, etc., or out of topic.
Plagiarized posts are not usually deleted for reference in case the member gets banned and tries to appeal later. But I don't think this is plagiarism because it's the medium channel so it's their content.