I'm trying to establish a group of traders that encompasses the midwest of the United States, anywhere from Texas to Wisconsin and Arkansas to Colorado. Is there a way to invite people to a group like this with one click instead of typing their name out one at a time? I assume that there are ways to either decline the invite or accept, correct?

Hi,

Unfortunately we don't have at the moment any mass-invite feature for the communities admins. And yes, the persons in question will receive an email and a confirmation dialog shows up for them where they can accept or decline the said invitation.