Oh come on.....this is not talking about people renting points from members, lol! This refers to people renting cash rooms from Disney! The computer only knows the reservation is made with points, thus the internet is free. That's why a member booking through CRO would be charged, as it says in the 2nd part of the sentence.
I've also had a front desk cast member tell me as long as the room is booked on points, everyone gets free internet because the computer doesn't know they're not the members. I've also NEVER in over 100 dvc stays been asked for my blue card. My resort id says "dvc member" and that's all it takes to get any perk I've taken advantage of. People renting from members will also have a room key that says dvc member, and they'll still get the discounts (except the annual pass discount).