Yes, the link goes though qgmail. It contains a unique identifier. So if you click the link, then they can count the number of people that used it.

You can see the number of times the link was used at the end of the document posted here:

www domesticairclass com/Portals/0/Document%20Files/03.%20Decl.%20of%20Shannon%20R.%20Wheatman.pdf?ver =2018-12-06-095638-000

You have to put the dots in because I am not allowed to post links.