All that's currently available about these exemptions is
vague information listed on the ESDC's website, although the federal government has promised an updated owner / operator manual for some time.
The rest of them from site where you can exchange contact
information without paying extra (
listed above) are scammers that write to you and then once they feel there is a connection or write long enough (most of them don't pay any attention to what you actually write, it is a
vague ambiguous response to make you feel they like you more and more with every letter.