The Verizon Branches Challenge and the Verizon Champions Challenge are TWO different competitions, so I am unsure what you are trying to say.
The Verizon Branches Challenge is for Veterans and we are verifying military service using ID.me as stated in the article. This is for the donation to charity. If account sharing occurs that's simple, because they will be disqualified and all they would be doing is handicapping their team.
The Verizon Champion Challenge is for everyone that participates in Clan Battles and qualifications are already done for that.
I will pass your feedback up for further tournaments but remember there are a lot of people involved in this event and a lot of other variables as this is the first time we are doing something like this, some people are going to of course not be okay with how it is executed but all we can do is learn from it and move forward.
Mahalo,
-Hapa