"Despite our best efforts, the Plaza has informed us that the Nevada Gaming Commission has ruled that we may not wear or display logos for online gaming sites while playing in our tournaments during BARGE because this "promotes on-line gaming". There is no issue other than during the Tourneys themselves."

Never heard of such a thing for regular tournys.

"display logos for online gaming sites"
The casino can not display these but no one has ever told me players can not.

TV networks have this rule when filming for TV broadcast. But they have no problem with players wearing .net advertising.

Check out High Limit series running right now.
.net is on the layout and 8 of the 10 players are wearing .net shirts. They were paid $20,000 each to wear them.