Sort:  

I was talking about the post-promotion groups.
Sharing post to promote steemit is a really good idea

I don't know about those groups.

There are groups on Facebook where people can share their posts and get upvote
This is good in theory but people don't upvote they just share their posts and that's it

Yes, it's usually the case in those kind of arrangements and it's a waste of time for everyone.

Yeah you are right.
People want to get upvotes but they don't care to upvote others