Yeah, I see newbies posting multiple times, focusing on quantity, rather than quality.
The writing challenge is a very good idea as they learn to be consistent and also engage. At first, making 10 comments may seem like a task, but when you find a lot of interesting people, you will be dropping more comments without knowing it.
Congrats on the initiative and keep up the good work as helping newbies is very important. You can drop the link to my post, of course. If you think it helps, why not, after all the purpose of the post is to help.
I did drop the link of this your post to the group but I haven't yet received a reply or feedback from them hehe, maybe they are busy hahaha.