When making any swap, you need to pay some commissions:
First, there is the Everscale blockchain fee that you pay when interacting with the contracts of the network.
Fees are one of the ways in which validators are rewarded for their work: fees from all transactions that have been included in newly created blocks are distributed among all participating validators.
Everscale network fees are negligible and are limited to a few cents when making swaps.
Also, you pay a commission of 0.3% of the transaction amount to providers that provide liquidity to the pool of tokens that you exchange (Liquidity Provider Fee).
The amount of the commission is evenly distributed among all liquidity providers depending on their share in this pool, and they can take this reward by removing their liquidity (burning LP tokens).