Unsure if i agree about the challenges i just started one last week myself and have been blown away by how many people have joined in - in my mind its a good way to get to know steemians better. And for me I am not going to have a lot of time for steemit over summer so its a good way to keep writing content. I think it attracts newer users though who struggle with coming up with content ideas.
Noted - i wont nominate you for any future challenges @tarazkp