Buys only. A sell inside the window is
untouched — the pool checks what it receives on a sell, so a tax there would make
the trade fail rather than cost anything. Your own first buy is exempt: it happens
inside the launch transaction, before the window starts. The coin page shows a badge
saying the coin has the window, and counts it down while it is open.
You can void your own badge. The window only taxes the pools this
launch creates, so if you later open a pool for this coin at another fee tier, buys
there are untaxed — and VVVX withdraws the badge from the coin the moment it
finds one.