The three lines on your ticket
Up to three separate numbers make up what a copied trade costs you. They come from different places, and only one of them goes to Polycopy.
The market fill price
What you pay for the shares themselves. This is set by the order book at the moment your order fills, not by Polycopy or Polymarket.
Polymarket's own fee, on some markets
Polymarket charges its own fee on some markets. It varies by market category and price, it is set by Polymarket, and it goes to Polymarket, not Polycopy. See Polymarket's help center for their current schedule.
Polycopy's flat fee
A flat 0.5% of the trade, charged on top of the trade as a Polymarket builder fee. This is the only money Polycopy takes from a trade.