Might want to correct this...Hate to drill it home, but Premiums should be able to attach, everyone to see...That is a decent benefit for Premiums as they can simply use this service (not having to use off site host like photobucket), and as it stands now, if I was premium and knew no one but premiums could see attachments, I wouldn't use it.
That list has been changed/edited since we introduced the premium silver and gold services. This would be the correct list now:
Interference.com - Premium Upgrades