My issue in the guidelines is this line:

“8. Must not promote other blocks, plugins, or themes.”

WordPress businesses should be able to promote in the Block Library. The “How” should just be standardized so that it will not get out of hand and to make things clean and non-obtrusive.

What I suggest is to allow a few types of promotional messages which include a link.. kind of like a donation link that we currently have right now in themes and plugins, but you can change the text to some extent. It can be a simple note like “this block is part of xyz plugin” in the block description or the bottom of the inspector for that block.

There are also a number of comments in the GutHub PR mentioned in the announcement post.