sell or spam? - Why was it that my account suddenly was not existing already?

http://usersupport.multiply.com/notes/item/6851?mark_read=usersupport:notes:6851&replies_read=29
Running a store won't get you canceled unless you spam users with personal messages or invitations, or if you spam groups promoting your site.

What people post on their own sites is their own business. If you feel "spammed" so to speak, it's because you choose to allow them in your network. You can easily remove them.

We have a reviews section (though other sections can be used as well) to talk about other products and services and we can also post on our own sites, items we are personally selling on occasion in our market section.

But we can't post these items in just any group or someone else's site or PM it to non contacts, etc. That's spamming.