I must confess, I don't have an answer on this.
I'll note, though, that in the Ontario general election that's happening right now, some members might have seen an article online on CBC today saying that there are some unregistered third parties that are carrying out online advertising with names that are generic, that don't really identify the group. People are wondering who these people are. There are no leads in how to start even reaching out to them just to make sure they do register if they have reached the $500 threshold.