No, you're talking about boosting (equivalent to retweeting). As you say, you can't add a CW doing that. So, people re-post manually (the content of the post,

No, you're talking about boosting (equivalent to retweeting). As you say, you can't add a CW doing that. So, people re-post manually (the content of the post, and/or a link to the post) with a CW. The request is not to do that.