[Can a creator limit what you do with a transferable object (like prevent you from selling it)?]

There's a vendor (I won't say who) with a random chair that gives away collectible objects, with permissions that are transferable.

I played it on and off for several days until I had a complete set, and of course was left a bunch of duplicates I didn't need. I figured I would sell those for a little amount ($L50) to make up for the time I spent. Luckily I discovered the notecard that comes with it before I did that:

Quote

You can trade these ____ or gift them, but you can not sell them!
IF so DMCA will be filed!

You can trade your _____ for a modify/copy one, send a folder renamed to your avatar;s name
with your _____ and I will replace them.

 

Ok I won't be selling them for sure.

I understand that if I did, I would be selling something someone else made (although that's ok with Gachas), and something I got for free (although I did spend time)... Something about that threat bothers me. I thought that the original spirit of Linden Lab's permission system was to prevent people from restricting what you could do with an object if it was transferable. 

Can a creator make such a threat?