Well the forums are mentioned in the guidelines:
https://blogs.secondlife.com/community/features/blog/2009/02/25/second-life-discussion-guidelines
https://blogs.secondlife.com/community/features/blog/2009/02/25/second-life-discussion-guidelines
I realize the above guidelines deal with forum posting, but something caught my attention (highlighting mine):
Exceptions for Profiles and Signatures: The purpose of the Second Life web profile and signature text is to tell others something about you and your posts that they will find interesting, pleasant, funny, thoughtful, or helpful. The profile and signature are not for advertising or commercial promotion. However, you may include in your profile photo your company logo or the name of your business. You may also associate tags with your profile, and your tag may be the name of your business inworld or on Xstreet SL. In your signature text, you may include your business name, SLurl links to your inworld stores, links to your Xstreet SL marketplace listings, as well as links to your personal website, so long as the website does not include any offers to trade, sell, or purchase outside a Linden Lab property as described above.
I know this quote is specifically addressing forums, but I'm wondering if LL has or will take action against merchants displaying other marketplace sites in world. (ie. I've been seeing a particular one now at several merchant sites and was planning to post one myself.)
Has anyone heard anything about this?