Three open boards on Chit Row
Arcade Blast, Arcade Neon and Carnival Night are indexes 0, 1 and 2. The lock script treats an index under 3 as open. That is why these three ignore the account and the next twenty-one do not. The choice is positional. It is not a quality ranking, even though Arcade Blast also carries a Hot label.
Arcade Blast
A bright cabinet. Use it when you want to see the spin control without typing an email. The page for the board is Arcade Blast. The circle on the floor opens the same frame.
Arcade Neon
Same gate, different backdrop. If Blast is enough to judge the controls, Neon is the check that a second file in the series behaves the same way. It should. The XP rules will not apply until you sign in, and then they apply to Neon the same as to Gladiator Arena.
Carnival Night
The last guest board on this series. After it, Chess Master asks for the desk key. Registering once opens Chess Master and every later Chit Row file, plus the locked files on Phosphor Bay and Tile Dock. You do not register per series.
Signing out puts the lock back on index 3 and above. The three open boards stay open. Level is irrelevant to this paragraph. A rung-6 account and a brand-new account see the same locks.