my subscriptions have been mostly coming through posts about new communities.
when someone posts a link to a remote, they are formed in such a way that my mbin instance automagically searches for, creates and dumps me into that newly created remote community. im sure its just a part of its search/routing.
at that point, the instance is subscribed to the remote community.
then i click 'subscribe', which subs my specific account.
edit: yep, theyre crafting the links to force it through the processor like this