Hi Kitty, I read all the comments and also the post of @nsijoro my opinion might be completely different but I wanted to share it here too:-

• Steemit is blogging platform, people write, post and engage, so nobody promised that users will definitely will get an Upvote, we all want to have decentralised place, no control no censorship no obligation
• SEC or Teaching challenges that is something new that Steemit decided to promote to get better quality posts and engagement the same time for users to learn something. As always it is an attempt to see if people will like it or not and who knows it might go into long life but it could be short
• why many users take part in many teaching home works? The reason because Steemit Team announced that they will Upvote the home works with SC01/02 and the first posts had even 100% of SC01, is it not a motivation to try and to get a lucky draw?
• in my opinion, people should write comment if they feel that they want to write and have something to say. I do not like when people write comment only because they know that they receive an Upvote, because it is not real, not coming from a person but it is done for getting paid.

Hope that makes a sense...